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Soldermask
printable view
Making Circuit Boards
Raw Material
Clean & Apply Photoresist
Expose & Develop
Etch Inner Layers
Strip Photoresist
Lay-Up For Lamination
Lamination
Drill Holes & Etchback
Electroless Copper & Strike Plate
Apply Photo Resist
Outer Layer Expose & Develop
Pattern Plate
Strip Resist
Etch Copper
Tin/Lead Strip
Soldermask
Final Finish
Silkscreen
Soldermask
Liquid Photo-Imageable Soldermask
Soldermask is a protective layer of acrylic-epoxy (normally green) applied over bare copper lines. Known as
S
older
M
ask
O
ver
B
are
C
opper (SMOBC). The process to apply soldermask is to clean, coat, expose, develop and cure.
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