3. CTE could be related as filler concentration in turn may determine the CTE of a material. Syed. -----Original Message----- From: Frank K. Frimpong [SMTP:[log in to unmask]] Sent: Thursday, August 06, 1998 3:52 AM To: [log in to unmask] Subject: [TN] CTE of PCB material. Hi fellow Technetters and Chipnetters, 1 Does anyone know how I can measure the sensitivity of semiconductor components to alpha particle radiation. 2 What will be the main emitters of alpha particles in a flipchip, pwb/pcb assembly? 3 Does material TG play a role in the emissivity of organic substrates? 4 I have also heard it mentioned the Silicon -Germanium dice is more likely to be affected by the emissions than silicon or Gallium arsenide. is this true? if so why? 5 Are there any ways of controlling, reducing or eliminating these emissions, perhaps by laser treatment etc. I am looking forward to receiving all your replies Thanks. ################################################################ 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's web site (http://www.ipc.org) "On-Line Services" section 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's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################