I know in working with vendors that they inspect that the thermal compond fills all air gaps. When mating the heatsink and the component you want enough grease to just begin to squeeze out from the sides of the components. This was derived by talking to apps engineers at various component houses. That was as specific as they said they could be. ----- Original Message ----- From: "Phil Nutting" <[log in to unmask]> To: <[log in to unmask]> Sent: Tuesday, August 14, 2001 8:42 AM Subject: [TN] Application of Thermal Grease We use many TO-220 and TO-247 packages mounted to heatsinks. Some of these applications require the use of thermal grease. The age old question is how much grease is enough? This is a political football that is constantly tossed around. Does anyone know of a manufacturer's specification or some organization's standard that clearly defines how much thermal grease is the correct amount? Thanks, Phil Nutting Manufacturing Engineer Kaiser Systems, Inc. ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------