| ??? 10/05/04 13:59 Read: times Msg Score: +1 +1 Informative |
#78787 - RE: Purpose of heat sink compund - Steve Responding to: ???'s previous message |
Raghunathan wrote:
------------------------------- If the above is not ensured, then when two "flat " metals are bolted together, the contact between both is at the crests - which basically is a point contact.
In such a situation the paste acts as a filler in the valleys "improving" conductivity. We actually routinely lap surfaces to get them flat - especially when using Peltiercells. Apply a smooth layer and press. Wipe off the extruded paste from sides and when bolting, Absolutely disagree entirely. Apply a thin, virtually translucent smear, clamp device to specified limits. Try it. Measure the case temperature. Been there, done that. Changed methods. Steve |
