Flexible Circuit Manufacturing
Minimums and Tolerances
Positional or pitch tolerance is heavily dependant upon flex material properties and circuit construction. Designs with ground planes and stabilizing Cu layers can result in lead pitch tolerance of +/- .0015" per inch (4 sigma process).
| Description |
Standard
|
Advanced
|
| Via size |
.015"
|
.002"
|
| Minimum Lead Width |
.004"-.008"
|
.0015"
|
| Minimum Lead Spacing |
.004"-.008"
|
.002"
|
| Cu-Cu layer Registration(2 layers) |
.002"
|
.0005"
|
| Cu Layer Count |
1-2
|
5-6
|
|
Pitch Tolerance (windowed leads)
|
|
|
+/- .002"/in.
|
+/- .0005"/in.
|
|
|
+/- .0015"/in.
|
+/- .0005"/in.
|
| Die-cut Coverlay Opening to Copper |
+/-.015"
|
+/-.005"
|
| Etched Coverlay Opening to Copper |
+/-.010"
|
+/- .005"
|
| Laser Coverlay Opening to Copper |
+/-.002"
|
+/-.001"
|
| PTH Capture Pad Size (buried) |
Via Dia +.020"
|
Via Dia +.004"
|
| Edge Seal |
.020"
|
.005"
|
|
Outline Excise
|
|
|
+/-.010"
|
+/-.002"
|
|
|
+/-.015"
|
+/-.003"
|
|
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