Maybe the signal is getting a little lossy in the 8 GHz range... Dave Roach Trane GCC 4833 White Bear Parkway St. Paul, Minnesota 55110 651-407-4294 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Kerry McMullen Sent: Wednesday, June 22, 2005 11:00 AM To: [log in to unmask] Subject: Re: [TN] BGA Intermittent Saga, part 2 Must be a plating issue................ "Ingemar Hernefjord (KC/EMW)" <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 06/22/2005 10:09 AM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to "Ingemar Hernefjord (KC/EMW)" <[log in to unmask]> To [log in to unmask] cc Subject Re: [TN] BGA Intermittent Saga, part 2 Europe is always a little in advance compared with the US, so I use to get them even before they are put up in Oklahoma.. Inge PS. Steve needs something to chuckle at...poor man, arbitrator for more than 1,000 quarrelsome techies.. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Stadem, Richard Sent: den 22 juni 2005 15:55 To: [log in to unmask] Subject: Re: [TN] BGA Intermittent Saga, part 2 For those of you who benefit from Steve's website: I have noticed that there is a little delay before the rest of us can see the pics, for some reason. If you do not see new pics right away after he says they are there, just wait a few minutes and try again. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Stephen Gregory Sent: Wednesday, June 22, 2005 8:37 AM To: [log in to unmask] Subject: Re: [TN] BGA Intermittent Saga, part 2 Hi George! Yep, they're up...I just checked. Kind regards, -Steve Gregory- Senior Process Engineer LaBarge Incorporated Tulsa, Oklahoma (918) 459-2285 (918) 459-2350 FAX |---------+----------------------------> | | "Wenger, George | | | M." | | | <George.Wenger@an| | | drew.com> | | | | | | 06/22/2005 07:44 | | | AM | | | | |---------+----------------------------> >----------------------------------------------------------------------- ---------------------------------------| | | | To: "TechNet E-Mail Forum" <[log in to unmask]>, <[log in to unmask]> | | cc: | | Subject: RE: [TN] BGA Intermittent Saga, part 2 | >----------------------------------------------------------------------- ---------------------------------------| Steve, Are you sure they are up I can't see them on page 2? Regards, George George M. Wenger Reliability / FMA Engineer Base Station and Subsystems Group Andrew Corporation, 40 Technology Drive, Warren, NJ 07059 (908) 546-4531 [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Stephen Gregory Sent: Wednesday, June 22, 2005 8:37 AM To: [log in to unmask] Subject: Re: [TN] BGA Intermittent Saga, part 2 Good Mornin' Leo and Everyone! Well, today is starting off really good! (but I just got in...hehehe). Your two pictures are up Leo. Go to: http://www.stevezeva.homestead.com and click on Picture Page 2, and look for; "No Nickel Corrosion, and Nickel Corrosion". Kind regards, -Steve Gregory- Senior Process Engineer LaBarge Incorporated Tulsa, Oklahoma (918) 459-2285 (918) 459-2350 FAX |---------+----------------------------> | | Leo Higgins | | | <Leo_Higgins@ASAT| | | .COM> | | | Sent by: TechNet | | | <[log in to unmask]>| | | | | | | | | 06/21/2005 11:18 | | | PM | | | Please respond to| | | TechNet E-Mail | | | Forum; Please | | | respond to Leo | | | Higgins | | | | |---------+----------------------------> > ------------------------------------------------------------------------ --------------------------------------| | | | To: [log in to unmask] | | cc: | | Subject: Re: [TN] BGA Intermittent Saga, part 2 | > ------------------------------------------------------------------------ --------------------------------------| I will send a pair of pictures from an Amkor paper showing optical micrographs showing Ni corrosion and a pad with no Ni corrosion to Steve to see if he can put up on his web site. Published studies on Black Pad issues often show similar structures. Steve can you post the 2 photos? I will send after this note. Best regards, Leo Director of Applications Engineering ASAT, Inc. 3755 Capital of Texas Highway, Suite 100 Austin, Texas 78704 ph 512-383-4593 fx 512-383-1590 [log in to unmask] www.asat.com The information contained in this electronic message is CUSTOMER/SUPPLIER PRIVILEGED AND CONFIDENTIAL INFORMATION intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution and copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by electronic mail. Thank you. -----Original Message----- From: [log in to unmask] [mailto:[log in to unmask]] Sent: Monday, June 13, 2005 2:16 PM To: [log in to unmask]; [log in to unmask] Subject: RE: [TN] BGA Intermittent Saga, part 2 You state to look for Au cyanide etching in the eless Ni. With what instrument or is this under a high power micro scope (1000X). Can you describe what to look for or perhaps you can share a photo of the artifact you are suggesting. Victor, -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Leo Higgins Sent: Monday, June 13, 2005 1:39 PM To: [log in to unmask] Subject: Re: [TN] BGA Intermittent Saga, part 2 Excessive stress from pneumatic presses used to bond heat sinks to BGAs after board level assembly has been shown to induce failure at the solder to BGA pad on packages that meet pre-SMT assembly quality specs in all ways. Subsequent analyses may show no evidence of black pad (cross sectioning to look for Au cyanide etching into the eless Ni, etc.). Best regards, Leo Director of Applications Engineering ASAT, Inc. 3755 Capital of Texas Highway, Suite 100 Austin, Texas 78704 ph 512-383-4593 fx 512-383-1590 [log in to unmask] www.asat.com The information contained in this electronic message is CUSTOMER/SUPPLIER PRIVILEGED AND CONFIDENTIAL INFORMATION intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution and copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by electronic mail. Thank you. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Jana Carraway Sent: Monday, June 13, 2005 1:01 PM To: [log in to unmask] Subject: Re: [TN] BGA Intermittent Saga, part 2 Werner, If it's black pad on the component side, how would Kerry prove or disprove it? Could he find the cause by using Auger or cross-section? What would be the appropriate tests to perform to find root cause? Should he send a component back to the supplier for root cause analysis? Thank you, Jana Carraway Jana Carraway MSEI - Advanced Technology Group 6024 S.W. Jean Road Lake Oswego, OR 97035 503.697.5291, ext 1180 email: [log in to unmask] -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Werner Engelmaier Sent: Monday, June 13, 2005 10:04 AM To: [log in to unmask] Subject: Re: [TN] BGA Intermittent Saga, part 2 Hi Kerry, You most likely have 'Black Pad' on the componet side. That, together with the stess concentration from the SMD-geometry, caused a briitle ionterfacial overstress failure. Regards, Werner Engelmaier Engelmaier Associates, L.C. Electronic Packaging, Interconnection and Reliability Consulting 7 Jasmine Run Ormond Beach, FL 32174 USA Phone: 386-437-8747, Fax: 386-437-8737, Cell: 386-316-5904 E-mail: [log in to unmask], Website: www.engelmaier.com --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ----------------------------------------------------- __________________________________________________________________ This message may contain information that is privileged and confidential to LaBarge, Inc. 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In such event, you should destroy the message and kindly notify the sender by reply e-mail. --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/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 ----------------------------------------------------- ------------------------------------------------------------------------ ------------------------ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any unauthorized use of this email is prohibited. ------------------------------------------------------------------------ ------------------------ [mf2] __________________________________________________________________ This message may contain information that is privileged and confidential to LaBarge, Inc. It is for use only by the individual or entity named above. If you are not the intended recipient, you may not copy, use or deliver this message to anyone. 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