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Electronic PCB Assembly,EMS/OEM,SMT Production Line Contract Manufacturing Company In Shenzhen China,Turnkey Solutions PCBA Outsourcing Services
Express: PCB Fabrication // Assembly // Design
Professional: PCB Manufacturing // Assembly // product development // Engineering
Low Cost: PCB Manufacturing // Assembly // Design // Components Procurement
Quality Assurance: ISO 9001 for PCB and SMT quality control

Turnkey Solution:
Customers just need to write ONE purchase order to PCBSINO for a complete engineering task, we will do the project management includes:
PCB Circuit Diagram Design/Layout
PCB Fabrication
Component Procurement
PCB Assembly / PCBA / Pick and Place Surface Mount / Quality Manufacturing

PCBSINO (YISI) inc. is a contract offshore outsourcing manufacturer, offer outsourcing services, company locate in Shenzhen, CN China, focuses on the PCB prototype or mass production.
Design Capability:
The electronic design is called a schematic or circuit diagram. It is constructed in CAD format.At PCBSINO we use Protel, OrCAD, PADs,CAM350,Genisis... We have an experienced design house/ bureau be family with electronic projects, can do many product Research and Development work and PCB reverse engineering work. more . .

Express Electronics Manufacturing Services View assembly Line
We supply electronic manufacturing services(EMS): High quality Low cost bare PCB and PCBA to customers that requiring PCB fabrication and assembly.
PCB Assembly (PCBA) include through hole components PCB Assembly, SMT PCB Assembly,

----Electronics manufacturing have been the core business of PCBSINO from 2000.PCBSINO Sub-contract and Contract Electronic Manufacturing (CEM) Services also include part and full box build and testing, electronic design and component supply and kitting. Being a OEM electronics project supplier in Shenzhen, PCBSINO can procure the BEST and LOW Cost electronic components in Shenzhen,cn China for the customers, price much lower than Digi-key.

Our advantage: Sr. Engineer will go through the whole process: Design - component procure - PCB Fabrication - Assembly, we can make High Quality Data work, High Quality component,High Quality PCB, High Quality Assembly, and with these effort will come out High grade and reliable product.

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PCB prototype manufacturer doublesided and multilayer

In PCB-POOL? you get top quality pcbs manufactured at a fantastic price.

Calculate the price online for prototypes and small series of singlesided, doublesided 4ML and 6ML printed circuit boards.

1 Eurocard (3.937 inches x 6.3 inches)
- doublesided
- plated through
- partial hot air levelling (HAL lead free)

+ Tooling
+ Photoplot

Price example of a 8 day delivery plus EUR 14.00 shipping costs (domestic, within Ireland)

Time is money! Especially when it comes to orders needed in a hurry. If we don't manage to produce your fast turnaround ( with a base price factor >1 ) we will deliver the relevant product free of charge. This offer applies to any articles in your shopping basket with the above symbol.

FREE: EDA-Software for PCB-POOL? customers!

In cooperation with Ing.-Büro FRIEDRICH we offer FREE layout software TARGET 3001! as PCB-POOL? Edition.

This is not just a "sketch" program like the one currently on offer from a certain US competitor, this all-inclusive software package runs at a normal retail price of EUR 1,500.

The package includes the following:

Circuit layout

This is NOT a demo-version, NO pin restrictions, UNLIMITED size, Output for PCB-POOL? only
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Send us the pc boards and parts. We build it and return the completed pcb assembly. :-)
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We built our first RoHS pcb prototype assembly way back in 2005. Lead-Free assembly / RoHS assembly is old-news for us. We can answer your RoHS pcb assembly and RoHS pcb fab questions and build quality RoHS compliant electronic prototype and short-run assemblies.
Since 1986, Sierra Circuits has been a leading supplier of high technology, quick-turn Printed Circuit Boards. ISO-9001:2000 and MilSpec certified, Silicon Valley based company.

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On Holds Eliminated! A fantastic new No Touch process is here now. Details. Demo. No Minimum Order, No Pre-registration, No Hassle !
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Our experienced staff will review your quote request or design documents with $0 cost and you will receive the most competitive quote with valuable comments or suggestions to suit your need in a very fast fashion.We Provide
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As Low As
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Speedy PCB provides high quality PCBs at the most competitive prices. Our PCB manufacturing facilities suit your design needs in a very wide range. As an ISO certified PCB manufacturer, we commit to our customers a variety of unique services from small quantity prototype PCB to volume PCB Production. You will enjoy the quality and the low prices at the same time. FAST PCB PROTOTYPES
Please note our summer vacation is August 1-31
Latest date to confirm orders is July 25th, all orders sent after this date will be shipped in Sptember

Our mission is to provide our customers with quality fast turnaround prototypes at affordable prices. Since May 2007 all our prototypes are produced on ROHS compliant immersion gold process which is the only perfect finish for fine pitch SMD components with perfectly even surface and excellent solderability. Immersion gold outperform all other ROHS alternatives as SN100C (SnCuNi) HAL or immersion Tin - uneven coating for the HAL and wetting problems and whiskering at low temperature for both finishes. If your ROHS compliant design need reliability the only solution is gold finish.


We allow multiply different boards fo be panelized on same panel! This is the feature our customers most appreciate.
All other manufacturers would charge you ridiculous setup charges for every of your design or will not allow you to put different boards on same panel.
Why? Because they want to charge you more for the same work they do. They would panelize all customer's designs anyway to run them on their line but they just want to get more money from you.
We are fair to our customers - they pay for their panel area and we allow them to put as many boards on their panel as they need.
And of course we later on separate the different boards from the panel free of charge.

turnaround time 3-5 working days for prototypes with solder mask and component print

While most other PCB manufacturers will do plot & go or charge you higher price for "verified" production. We do Design-Rule-Check on all incoming boards before we run production.
If your board doesn't comply to our DRC or you did something silly we notify you not running boards with problems.

No hidden fees - you can calculate what your board will cost by yourself
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Soldermask and component print are standard option we don't charge extra for them as other PCB manufacturers do
Free panelization - we panelize your boards on the panel for no extra cost
Free de-panelization we'll cut-to-border your boards from the panel Electronic circuit prototype wiring board with visually distinctive contact pads Document Type and Number:United States Patent 5856636
Abstract:Electronic circuit prototype wiring board is fabricated with layers of electrically conductive material separated by layers of dielectric material. Contact pads of electrically conductive material are arrayed on a surface of the board. Columns of electrically conductive material extend upward from each of the conductive layers to selected contact pads, passing through perforations in any intermediate layers above, such that each of the pads is in electrical communication with only one of the conductive layers. All of the pads connected to a common conductive layer are of a similar geometric plan form which is associated with that layer and which is different and distinguishable from the plan form of pads in electrical communication with any other of the conductive layers. In an alternative embodiment, the wiring board is fabricated of an elastic dielectric material. Access points for each conductive layer of the board are identified by similar geometric shapes associated with that layer and which are different and distinguishable from shapes identifying access points for any other of the conductive layers. Pins fabricated of electrically conductive material are inserted into the elastic dielectric material to establish electrical contact with a desired conductive layer and be retained by the dielectric material to serve as a wiring post. Ads by Google
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Inventors:Sanso, David W. (6598 W. Oregon Ave., Lakewood, CO, 80226)
Application Number:08/810356 Publication Date:01/05/1999 Filing Date:03/03/1997 View Patent Images:Images are available in PDF form when logged in. To view PDFs, Login or Create Account (Free!) Referenced by:View patents that cite this patent Export Citation:Click for automatic bibliography generation Primary Class:174/255 International Classes:H05K1/00; H05K1/02; H05K1/11; H05K3/42; H05K1/03 Field of Search:174/255, 174/260, 174/261, 174/267, 361/748, 361/791, 361/792, 361/793, 361/794, 361/795, 361/774, 361/744, 361/780, 158/537, 158/158.1, 29/830, 29/852, 29/853 US Patent References:3257717 Method of making an electrode for use in the electrolytic formation of a hole in a metal workpiece June, 1966 Wilkinson et al. 29/825
4562513 Process for forming a high density metallurgy system on a substrate and structure thereof December, 1985 Arnold et al. 361/777
4959008 Pre-patterned circuit board device-attach adhesive transfer system September, 1990 Wasulko 428/40
5001605 Multilayer printed wiring board with single layer vias March, 1991 Savagian et al. 361/792
5286926 Integrated circuit package and process for producing same February, 1994 Kimura et al. 174/250
5363280 Printed circuit board or card thermal mass design November, 1994 Chobot et al. 361/794
5461202 Flexible wiring board and its fabrication method October, 1995 Sera et al. 174/254
5468917 Circuitized structure including flexible circuit with elastomeric member bonded thereto November, 1995 Brodsky et al. 174/255
5512712 Printed wiring board having indications thereon covered by insulation April, 1996 Iwata et al. 174/258
5570504 Multi-Layer circuit construction method and structure November, 1996 DiSefano et al. 29/830
5627730 Printed circuit board assembly for high speed data transfer New Scientist|Space|Technology|Environment|New Scientist Jobs|Subscribe to New Scientist
Modified ink printer churns out electronic circuits
18:24 18 April 2007
NewScientist.com news service
Tom Simonite

Enlarge image
A standard office printer loaded with silver nitrate and vitamin C can produce (clockwise from top-left) mobile phone antennas, circuits, RFID chips and inductive coils on a range of surfaces (Image: IOP/University of Leeds)Related Articles
Desktop fabricator may kick-start home revolution
09 January 2007
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12 April 2002
Goodbye wires and silicon, hello plastic chips
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Next generation ink-jet technology, Cambridge University
A desktop printer loaded with a silver salt solution and vitamin C has been used to produce electronic circuits. The UK researchers behind the feat say their experimental device could pave the way for safer and cheaper electronics manufacturing.

Being able to print out electronic components and whole circuit boards could provide an alternative to current manufacturing techniques, which are energy intensive and environmentally unfriendly.

Printing conductive polymer ink (see Goodbye wires and silicon, hello plastic chips), or pastes containing graphite or metal particles are two existing options. But researchers at Leeds University in the UK wanted to avoid the solvents needed for these processes.

PhD student Seyed Bidoki loaded a standard Hewlett Packard ink-jet printer with a solution of metal salts and water. After a pattern is printed using the solution, a chemical known as a reducing agent is then printed over the top to make solid silver form.

"We wanted to be able to use a totally water-soluble base," explains team member and chemist Matthew Clark. "That allows for much more environmentally friendly processes."

Metal ink
Bidoki loaded two separate chambers in the printer's cartridge, which normally contain different ink, with the metal solution and the reducing agent. Using silver nitrate solution as the "metal ink" and ascorbic acid (vitamin C) as the reducing agent proved the most successful combination.

He then programmed the printer to produce a variety of circuits and radio antennas on different surfaces including paper, cotton and acetate, all of which were placed in the printer like a normal sheet of paper.

"One test involved patterning an antenna like that used in a mobile phone on transparent film," says Clark. "It was possible to bend it almost in half without any loss of conductivity."

After a circuit is printed using silver nitrate, vitamin C is overlaid a few minutes later. Water can then be used to wash away other products, leaving the silver behind. Scanning electron microscope images reveal a rough surface of silver nanoparticles.

Join the dots
Printing the same pattern two or three times improves conductivity because it increases the number of contacts between silver nanoparticles. Desktop printers make images from tiny dots of ink that do not overlap, but bleed slightly into each other, explains Clark: "In future, we'd like to use an industrial jet printer that can so we'll need fewer passes."Resources
EE Info Sources Software Project Info FAQs RSI Page
UN-L Engineering Electronics ShopHome ? EE Shop Info ? ServicesElectronic Prototyping: Tips and Pitfalls
Thu, 04/03/2008 - 19:03 — eeshop This page will discuss electronic prototyping and construction methods. It was originally written in November of 1994; obviously much has changed in 14 years. Please note that many documents accessed through this page are taken from postings on the Usenet newsgroup "sci.electronics" and the information is the personal opinion of the person who posted it. We do not endorse or accept responsibility for any of these postings and provide them simply as potentially useful advice. Many thanks to Fil and his sci.electronics FAQ archive, referenced through several links here.

The on-line Electronics Design Checklist compiled by Hank Wallace compiles a wealth of suggestions from electronic designers. Check it out!
7-23-1998 - Superb articles on debugging embedded systems are found at The Ganssle Group website.

Index:[Time] [Basic Tips] [Breadboards] [Wire Wrapping] [Perf Boards] [Printed Circuits] [Data Books]



Based on the projects we've done as research technicians, and on the years of student projects we've observed, the greatest miscalculation students make when working on electronics projects that actually have to work is how much time it yakes. While people may allow enough time to design and build a project, they often don't realize that even in a really good project, the design and construction will probably be only half of the time required. It will probably take as much time to debug, fix, and/or redesign as it did to create it in the first place. It's very rare for new designs to work right off the bat, due to

Mistakes in construction - shorts, faulty connections, wiring mistakes

Errors in design - even if it is wired perfectly, you may have flaws in your basic concept.

Need for additions - you may not be able to tell until you test it that there are elements that have to be added to make it work as you want.

We have seen the blithe assumption that a project will work as per design without significant troubleshooting threaten the graduation of a student with a job waiting; don't let it happen to you. Budget yourself plenty of time to debug and re-engineer your project.


Basic Tips

These are a few other things that apply no matter what prototyping technique you choose:

Assume you will have to make changes. Whether it is correcting design flaws, fixing mistakes in wiring, adding extra circuitry, tweaking component values, or re-engineering your entire concept, the odds that you will NOT have to make any changes to your circuit are very close to zero. So choose methods that allow for easy changes, leave yourself enough space on your boards, and don't set anything in stone until you are certain it's working how you want it.

Account for ALL your pins. Whether or not they appear on your schematic or in an example circuit you are borrowing from, make sure you take a look at the data sheet for each IC and be sure that every pin is appropriately connected if it needs to be. The classic mistake here is the student who can't figure out why his op-amp circuit doesn't work, when they didn't bother hooking up the + and - voltage supply pins that didn't appear on the schematic. Besides power and ground connections, there may be chip enables, clocks,resets, and other similar inputs that have to be made happy before things will work. Unused inputs on extra gates should be connected to ground or the logic supply: left unconnected, some kinds of gates can oscillate and cause wierd problems. Unused outputs can be left open, as a rule.

Despike your chips. This means putting a .01 to .1 uFd ceramic capacitor from the +5 volt supply to ground right at the chip. power line spikes occur when there are sudden current changes far from the power supply, and it's amazing how much trouble this can cause.

Make good power supply and ground connections. A skinny, daisy-chained wire-wrap connection from chip to chip is probably not going to be enough. The more robust you can make power supply and ground leads, the better.

Keep your digital and analog circuitry physically separate whenever you can. Digital switching, especially at microprocessor buss or video card speeds, can throw all sorts of noise and trash into analog or audio circuitry.

"It's must be a bad chip" . . .NOT!!! When a circuit design doesn't work, the first impulse is to blame a failed component because we just know the design and wiring are right. In practice, it is really quite amazing how seldom the chips are at fault, and how much abuse (wrong wiring, wrong power supplies) many common chips will withstand without damage. (DO watch that static electricity, though.) The problem is almost invariably somewhere else. (One exception: if you put a standard EPROM in a socket backwards, which is easily done, and apply power, it's gone. Throw it away.)

Don't use silicon sealant to mount wire-wrap sockets or to seal/insulate circuitry. This stuff is handy and common but it is not an insulator. It will leak small currents, which may not matter in logic circuits but can wreak havoc in high-impedance analog circuits.

Build one whole device first, if you are intending to make several identical units. It's tempting to save time by, for example, drilling all the chasses for all the units while you have your drill set up: soldering all the boards at once; etc. etc. But if you then find you've got to undo or redo something that didn't work the way you thought it would, you've multiplied your mistake across all the units. Finish one unit completely to find all the mistakes and optimize the design, then go into "mass production."

Make sure you can get the parts before basing a design on it. You may find the ideal integrated circuit for your application in a data book, but it may not be in production, may be unavailable from distributors, or may be too expensive. Especially if you are creating a design you hope to produce for a while, it's wise to choose devices that are widely available and that (you hope) won't be discontinued. Electronic Circuit Prototyping

One of the greatest challenges faced by the hobbyist or the experienced user when engaging in electronic circuit prototyping is to underestimate the time it will take to complete a project. It is important to note that the phase of redesign and correction can often take as long as the initial design and build work. There is a great way to manage these difficulties though.

The SchmartBoard EZ, made by SchmartBoard, greatly simplifies electronic circuit prototyping by saving you time. There are a couple factors that are chiefly responsible for the need to make revisions in a given project--construction mistakes and basic design flaws. Wiring mistakes are very common, and even if you are deft enough to wire your project perfectly, there remains the possibility that you made a design error that was apparent only after construction.

To prevent and ameliorate these difficulties when doing electronic circuit prototyping, use the SchmartBoard EZ, the most advanced prototyping platform in the world. It dramatically reduces the likelihood of experiencing short circuits or other critical failures such as wiring mistakes. The proprietary design with the solder already on the board makes precision soldering even the smallest pitches hassle free.

Secondly, the SchmartBoard Ez makes it far easier to correct the design errors that are a regrettable yet inevitable part of electronic circuit prototyping. The SchmartBoard system allows you to build your circuit modularly, piece by piece, which makes it relatively simple to isolate and identify problem areas. By using the SchmartBoard system you save time and gain design efficiency.

Get A Free SchmartBoard Sample

News provided by MSN? - July 21, 2008

Soft IP Actually Does Exist for the Analog ASIC - Chip Design Magazine
Although all real engineers would like to create their designs from scratch, it just isn't practical in today's fast-paced, application-specific-integrated-circuit (ASIC) development world. In reality, a need exists to integrate intellectual property ...

Taken For Granted - Chip Design Magazine
Many things in our industry go in cycles. Perhaps the most famous of these is Makimotoa€?s wave which identifies the cyclic... This is a virtual roundtable discussion on structured ASICs-the product offerings and the issues related to the ...

MFLEX Names New Chief Financial Officer - dBusinessNews.com
ANAHEIM -- Multi-Fineline Electronix, Inc. , a leading global provider of high-quality, technologically advanced flexible printed circuit and value-added component assembly solutions to the electronics industry, announced today that it has named ...

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From Wikipedia, the free encyclopedia
Jump to: navigation, search
The process of circuit design can cover systems ranging from complex electronic systems all the way down to the individual transistors within an integrated circuit. For simple circuits the design process can often be done by one person without needing a planned or structured design process, but for more complex designs, teams of designers following a systematic approach with intelligently guided computer simulation are becoming increasingly common.

Formal circuit design usually involves the following stages:

sometimes, writing the requirement specification after liaising with the customer
writing a technical proposal to meet the requirements of the customer specification
synthesising on paper a schematic circuit diagram, an abstract electrical or electronic circuit that will meet the specifications
calculating the component values to meet the operating specifications under specified conditions
performing simulations to verify the correctness of the design
building a breadboard or other prototype version of the design and testing against specification
making any alterations to the circuit to achieve compliance
choosing a method of construction as well as all the parts and materials to be used
presenting component and layout information to draughtspersons, and layout and mechanical engineers, for prototype production
testing or type-testing a number of prototypes to ensure compliance with customer reqiurements
signing and approving the final manufacturing drawings
post-design services (obsolescence of components etc.)
Contents [hide]
1 Specification
2 Design
2.1 Costs
3 Verification and testing
4 Prototyping
5 Results
5.1 Documentation
6 See also
7 References

[edit] Specification
The process of circuit design begins with the specification, which states the functionality that the finished design must provide, but does not indicate how it is to be achieved .[1] The initial specification is basically a technically detailed description of what the customer wants the finished circuit to achieve and can include a variety of electrical requirements, such as what signals the circuit will receive, what signals it must output, what power supplies are available and how much power it is permitted to consume. The specification can ( and normally does ) also set some of the physical parameters that the design must meet, such as size, weight, moisture resistance, temperature range, thermal output, vibration tolerance and acceleration tolerance.

As the design process progresses the designer(s) will frequently return to the specification and alter it to take account of the progress of the design. This can involve tightening specifications that the customer has supplied, and adding tests that the circuit must pass in order to be accepted. These additional specifications will often be used in the verification of a design. Changes that conflict with or modify the customer's original specifications will almost always have to be approved by the customer before they can be acted upon.

Correctly identifying the customer needs can avoid a condition known as 'design creep' which occurs in the absence of realistic initial expectations, and later by failing to communicate fully with the client during the design process. It can be defined in terms of its results; "at one extreme is a circuit with more functionality than necessary, and at the other is a circuit having an incorrect functionality". (DeMers, 1997) Nevertheless some changes can be expected and it is good practice to keep options open for as long as possible because it's easier to remove spare elements from the circuit later on PCB SERVICES

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Located just 15 minutes away from PCBexpress?, your finished pcbs can be delivered directly to Screaming Circuits for assembly. You can take advantage of no hassle, quickturn no lead pcbs + assembly using our combined expertise.

It's easy! Just check the Screaming Circuits shipment option on your pcb order form.
Note: You must also order assembly service directly from their site for the complete board and assembly solution.

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