Hmm... Maybe we should call it a 'heating pad' and take two aspirin for the inevitable head aches that are bound to follow... :) LOL Best regards, Bill Brooks PCB Design Engineer, C.I.D.+ Tel: (760)597-1500 Fax: (760)597-1510 Datron World Communications, Inc. Vista, California -----Original Message----- From: Scott, Ron [mailto:[log in to unmask]] Sent: Wednesday, January 31, 2007 2:42 PM To: (Designers Council Forum); Brooks,Bill Subject: RE: [DC] naming conventions? All, In my neck of the woods, this is called a thermal pad.The thermal pad was introduced by TI and is used both as a thermal pad and to connect ground directly to the substrate of ICs. Cheers, Ron Scott C.I.D+ Texas Instruments Inc Storage Products Group Tel: 214.567.4715 Cell: 972.816.7978 [log in to unmask] -----Original Message----- From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Brooks,Bill Sent: Wednesday, January 31, 2007 14:00 To: [log in to unmask] Subject: [DC] naming conventions? Leslie Gomez and I were discussing standards and Cad library symbols and footprints and this subject came up... The question has been asked... is there a 'standard' naming convention for the large thermal pads used on the underside of chips like the QFN package? Some have called it a 'belly pad' others have called it a 'paddle pin'... some call it a 'die pad'. What do you call it and has anyone coined a 'standard name' for it? (Inquiring minds want to know...) :-) Reference: http://www.freescale.com/files/analog/doc/app_note/AN1902.pdf <http://www.freescale.com/files/analog/doc/app_note/AN1902.pdf> Best regards, Bill Brooks - KG6VVP PCB Design Engineer, C.I.D.+, C.I.I. DATRON World Communications, Inc. 3030 Enterprise Court, Vista, CA 92083 http://www.dtwc.com Tel: (760)597-1500 Fax: (760)597-1510 e-mail:[log in to unmask] IPC Designers Council, San Diego Chapter http://dcchapters.ipc.org/SanDiego/ Personal Website: http://pcbwizards.com ------------------------------------------------------------------------ --------- DesignerCouncil 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 DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ------------------------------------------------------------------------ --------- --------------------------------------------------------------------------------- DesignerCouncil 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 DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------------