I have seen this problem and identified the root cause as foreign material or contamination. Some common sources: excessive mold release on molded component packages, machining or plating chemicals on heatsinks, and the worst news, self-inflicted fun from residual assembly process materials. BV -----Original Message----- From: Bill Davis [SMTP:[log in to unmask]] Sent: Monday, June 15, 1998 8:01 AM To: [log in to unmask] Subject: [TN] Adhesives for Attaching Heat SInks to IC's Does anyone have a specific adhesive for attaching aluminum heatsinks to IC's? We're using Loctite 315, but are having dismal results (the heatsinks keep falling off). > ********************************* > Bill Davis, Ph.D. > Diamond Multimedia Systems > Senior Scientist > Tel. 408.325.7868 > Cell. 408.888.5650 > e-mail: [log in to unmask] > ******************************** > > ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################