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From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Mon, 15 Jun 1998 11:35:01 +0800 |
Content-Type: | text/plain |
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Dear Sir,
Some silver-filled conductive epoxies in the market claim to be solder
replacement, but successful use of these material require a very good
understanding of the epoxies properties, the process and CTE mismatch.
The epoxy can be deposited to the pad by stencil printing or
dispensing,
Dispensing process has the tailing problem which can cause short for
0402 chip resistor/capacitor. It is very difficult to form the fillet
for epoxy, because the epoxy may have a gap between the side of chip
resistor/capacitor and dot peak of epoxy. How much should the
placement force be applied and how big should the dot size for 0402
resistor/capacitor?
I like to discuss the above-mentioned issue in the TECHNET
Eden
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