Letter 28089

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

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

Bala Rajangam
- Singapore

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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