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EPOXY BLEED OUT PROBLEM

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HOW TO ELIMINATE THE EPOXY BLEED OUT PROBLEM IN SILVER NICKEL PLATED AREA ? EPOXY TYPE : ABLEBOND 979 FRAME BASED MATERIAL : FE PLATING : FULL CU , FULL NI , SELECTIVE AG CURE TEMPARATURE ; 150 DEG. CEL FOR 30 MINUTES

PLEASE HELP TO RECOMEND SUITABLE CURE TEMPARATURE AND TIME OR OTHERS PROCESS THAT CAN ELIMINATE THE EPOXY BLEED PROBLEM . PLEASE ALSO PROVIDE THE POSSIBLE ROOT CAUSE OF EPOXY BLEED OUT IN THIS PLATING PROCESS .

CHING CHIN HUI
LEAD FRAME - BAYAN LEPAS, PENANG, MALAYSIA


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[I have the same problem of] HOW TO ELIMINATE THE EPOXY BLEED OUT PROBLEM IN SILVER NICKEL PLATED AREA ?

Bala Rajangam
- Singapore


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They are two ways to prevent or minimize the epoxy bleed.

a) Tedious cleaning process using Freon or TCE
b) more effective way is to vacuum bake at 150C for 2 hours. This will drive the inherent chemical in the plating itselt. This is very effective way of preventing bleed issues.

rgds

Jasper Choong
- Singapore


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