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We allow multiply different boards fo be panelized on same
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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
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
And of course we later on separate the different boards from
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turnaround time 3-5 working days for prototypes with solder
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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
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
Integrated Circuit Design
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Get Prototype news & manufacturing info at IndustryWeek
Inventors:Sanso, David W. (6598 W. Oregon Ave., Lakewood,
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
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
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
Inkjet printers used to "spray on" displays
12 April 2002
Goodbye wires and silicon, hello plastic chips
25 January 2007
Search New Scientist
University of Leeds
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
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
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."
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
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
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,
Mistakes in construction - shorts, faulty connections, wiring
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.
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
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
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
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
Chip Scale Packages
Circuit Board Manufacturer
Circuit Board Prototypes
Electronic Circuit Boards
Electronic Circuit Design
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Surface Mount Components
Surface Mount Soldering Circuit design
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
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.)
3 Verification and testing
6 See also
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 .
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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