High quality low cost electronic outsourcing
  PCB Fabrication
PCB Assembly
  PCBA Service
Lead-Free Soldering
Electronic Circuit Design
Electronic Testing&Debug

circuit board layout,electronic circuit board layout design,PCB board layout,CN China

Express: PCB Fabrication // Assembly // Design
Professional: PCB Manufacturing // Assembly // product development // Engineering
Low Cost: PCB Manufacturing // Assembly // Design // Components Procurement

Turnkey Solution:
Customers just need to write ONE purchase order to Cn China-PCB-sourcing for a complete engineering task that includes the following:
PCB Circuit Diagram Design/Layout
PCB Fabrication
Component Procurement
PCB Assembly
Our design services - PCB Layout, Electronic Projects Engineering, High Quality, Low costs & Fast Service, backed up by great support.

Design Capability:
The electronic design is called a schematic or circuit diagram. It is constructed in CAD format.At China-PCB-sourcing we use Protel, OrCAD, PADs,CAM350,Genisis... We have an experienced design house/ bureau be family with both military & commercial projects, can do many product Research and Development work(R&D).We have over 80 active accounts with major component manufacturers & distributors (most with Internet access & next day delivery). If the part you require is out there, we'll find it for you.

Express electronic Manufacturing Services
We provide electronic manufacturing services:High quality Low cost bare PCB and PCBA;
(EMS) to customers requiring PCB fabrication and assembly,
sub-assembly, full turnkey box buildor precision mechanical assembly.
PCB Fabrication : 24 hours Express bare PCB manufacturing
PCB Assembly (PCBA), PTH PCB Assembly, SMT PCB Assembly

Turnkey solution
circuit board layout,electronic circuit board layout design,PCB board layout,CN China
circuit product PCb design, ,electronic circuit schematic design, shenzhen, cn China

Electronic Prototypes is your contract manufacturer for prototype development and printed circuit board design. Our development staff will assist in your project as much or as little as necessary to meet your goals.
It is our goal to provide our customers with prompt and polite service, with accurate and timely results.Practical Electronics/PCB Layout
From Wikibooks, the open-content textbooks collection
< Practical Electronics
Jump to: navigation, search
PCB layout: The efficient laying out of traces on a PCB is a complex skill, and requires much patience. This task has been made vastly easier with the advent of readily available PCB layout software, but it is still challenging.

Contents [hide]
1 Copper Thickness
2 Trace Width
3 footprints
4 holes
5 layers
6 Reference Handbook
7 layers
8 traces
9 further reading
10 references
11 External links
11.1 Manufacturer design tips
11.2 Other external links
12 Further reading

[edit] Copper Thickness
The vast majority of PCBs are manufactured with "1 ounce copper" on the outer layers. (If there are inner layers, they are almost always manufactured with "1/2 ounce copper"[citation needed] ).

The thickness of the copper layer on the PCB affects the behaviour of the circuit. PCB copper thickness is usually measured in ounces per square foot, or frequently, just ounces. It can also be given in micrometres, inches or mils. The measurements for common thicknesses are given below.

oz/ft² μm in mil
0.5 17.5 0.0007 0.7
0.75 25.5 0.0010 1.0
1 35 0.0014 1.4
2 70 0.0028 2.8
3 105 0.0042 4.2

As always, the thickness of a thin slab of metal with a given top surface area is always exactly

The area is "1 square foot" (144 square inches), the density of copper is 8.96 mg/mm^3 = 5.18 ounce/(inch^3), and usually the mass is "1 ounce of copper",

[edit] Trace Width
Different widths of traces have different properties that could affect the operation of the circuit. For, example, a thin trace has a higher resistance than a thick one, and can therefore carry less current or will heat up more for the same current.

Due to the large number of tables and charts, this information is presented on different pages:

For current capacities, see Trace Current Capacity.
Most manufacturers can manufacture a minimum trace width of 0.010 inch. (Many can manufacture traces 0.008 inch wide). Such minimum-size traces are more than adequate for most digital and analog signals.

Summary: Most design engineers still believe that with a good shielded enclosure, well-shielded cables and high-performance ferrite sleeves, EMI compliance will be a straight forward task. This paper demonstrates experimentally that a poor PCB layout can cause electronic product to fail EMI specification badly even with all these fixes.

[edit] footprints
The manufacturer of each part recommends a "footprint", a copper pattern for the part to be soldered to the PCB.

[edit] holes
Most PCBs have many holes drilled in them.

Most PCBs with more than 1 layer have every hole "plated-through-hole", even holes that don't need to be plated through-hole (tooling holes and some through-holes). They do that because it takes extra effort to plug "non-plated" holes before throwing the PCB into the plating bath.

There are 3 general types of holes

All work done in the United States.
Impact of PCB layout design on final productapos;s EMI compliance
Kye Yak See; Oswal, M.; Khan-ngern, W.; Canavero, F.; Christopoulos, C.; Grabinski, H.
Electromagnetic Compatibility, 2006. EMC-Zurich 2006. 17th International Zurich Symposium on
Volume , Issue , 27 Feb.-3 March 2006 Page(s): 553 - 556
Digital Object Identifier
est. 1995At Electronic Prototypes, Inc. we will work with you to determine the most reliable, safe and cost effective board.


PCB circuit rebuild
Remote control board design
PCB fabrication PCB circuit board supplier
Power supply circuit board PCB design k4
PCB board design k5
circuit board repair k6
PCB trade commercial business k7
contract manufacturing k8
electronic manufacturing k9
PCB Assembly k10
electronics manufacturing k11
electronic assembly k12
electronic manufacturer k13
circuit assembly k14
board assembly k15
circuit board assembly k16
printed circuit board assembly k17
electronic manufacturing services k18
electronics assembly k19
electronic contract manufacturing k20
PCB board assembly k21
electronic contract manufacturer k22
SMT assembly k23
PCB assembly services k24
pcb assembly service k25
PCB manufacturing
china manufacturer k26
contract manufacturing k27
PCB manufacturing k28
PCB fabrication k29
PCB manufacturer k30
express PCB k31
rapid manufacturing k32
PCB manufacture k33
PCB manufacturers k34
circuit board manufacturing k35

rapid prototyping k36
rapid prototype k37
prototype design k38
PCB prototype k39

design graphic k40
design company k41
product development k42
schematic diagram k43
engineering services k44
design engineering k45
product design k46
circuit diagram k47
circuit design k48
design engineer k49
layout design k50
power design k51
design firm k52
project design k53
CAD design k54
PCB design k55
electrical design k56
electronic design k57
electronics engineering k58
electronic engineering k59
board design k60
analog design k61
PCB layout k62
RF design k63
electronics design k64
electronic engineer k65
product engineering k66
cad services k67
board layout k68
product design development k69
industrial designers k70
circuit board design k71
circuit layout k72
PCB designer k73
product designers k74
print circuit design k75
schematic design k76
electrical electronic engineering k77
electronic circuit design k78
PCB designing k79
circuit board repair k80
electronics development k81
printed circuit board design k82
PCB schematic k83
new product design k84
pcb repair k85
RF circuit design k86
circuit designs k87
PCB circuit design k88
PCB board design k89
electronic product design k90
circuit board layout k91
PCB layout design k92
product design company k93
PCB design layout k94
electronic design services k95
PCB engineering k96
PCB rework k97

Copyright 2007 China-PCB-sourcing Technologies Co.,Ltd. All rights reserved.
circuit board layout,electronic circuit board layout design,PCB board layout,CN China