文档介绍：Double Side ( Non-PTH ) PCB
Prepare by YT Chin
2001
Design Guideline
Presentation
1
Objective
Cost Saving
Double side ( Non- PTH ) PCB
can saving 40% ~ 50% compare with
Double side ( PTH ) PCB
* Base on FR-4 PCB Material
2
Types of PCB Material
FR-4 - Preferred
CEM-3 - Acceptable
CEM-1 - Limited Acceptable
FR-1 - Limited Acceptable
3
The types of “Connector”
Types of Connector Limitation
Jumper by AI process ~ mm Prefer
AI ponents ~ mm Limited acceptable
* except “Glass” Diode
Rivet ( eyelet ) 2 mm Limited acceptable
*for Bulk cap only
RI ponents - - - - - eptable
4
Guideline
Use same type of “Connectors” for PTH function and jumper wire is preferred.
It should be separate to individual parts for connection can’t use the leads ponent at the same time.
* If necessary, AI ponent is acceptable,
except “Glass” ponents.
5
Guideline (continues)
It must place on low ponent area and under ponents is eptable.
The marco of solder pad must maintain * 50% opening on hole ponent ponents side.
* The opening can provide the air release function to
improve solderability for Wave soldering process.
6
The limitation of “Connector”
Body ponent + 4 mm
eg. 1/4W small size resistor the pitch is mm
( mend pitch is , 10, , 15 mm )
- Pitch ponents
9
Process Flow for Non-PTH Design
DET-5
AI > RI > SMD > Components side soldering > HI
DCGP
AI > Components side soldering > RI > SMD > HI
10