what is the seal material? the substrate surface finishing? (especially the lid surface finishing). If you use polymeric material as a seal, your fine leak test doesn't mean anything - He got absorbed in the polymer... is it glass or metal seal? what kind? please don't drop a satellite on my head on Fri the 13. jk > Drew, > > Thanks for the feedback, and it is good to hear that someone has seen this > defect before with a cerdip. I was wondering if this type of problem might > be more prevalent with the cerdips. > > Howard A. Watson > > > -----Original Message----- > From: [log in to unmask] [mailto:[log in to unmask]] > Sent: Friday, March 13, 2015 8:57 AM > To: [log in to unmask]; Watson, Howard August > Cc: [log in to unmask] > Subject: RE: Mechanical failure of 8-pin Cerdip > > Howard, > > Not common but it does happen. I have witnessed this once. When I was > working at Fisher Controls International. This was in the pre ICT days. > Each assembly type had a custom made test box designed and built for it. > One of the test department folks called us out to see this. He had a > completed assembly on the test box. The assembly was fully functional, > passed all set up and test process. When he had finished test he noticed > a fourteen pin Cerdip missing it's lid. Electrically sound. We joked > about shipping it that way but of course off to repair it went. Cerdips > can fail at the glue line if impacted hard or if the bond was compromised > in some fashion when it was made. As long as it is very rare all you can > do is scrap the bad part or tube of parts if your uncomfortable with the > risk on the balance of parts in the tube. > > Drew Meyer > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Watson, Howard August > Sent: Friday, March 13, 2015 9:36 AM > To: [log in to unmask] > Subject: [TN] Mechanical failure of 8-pin Cerdip > > Hello TechNet, > > I have an IC Op Amp that was found in stock with the lid separated. The > stock room discovered this while kitting components, so this part was > minimally handled. It was stored in the original IC tube. Collectively, we > have never seen an occurrence of something like this, and I wonder if any > of you have experienced this before. The explanation I got from the > manufacturer is that it is most likely a packing and/or handling problem > and that if there is too much slack in the tubes, the parts colliding > together could cause the lid to pop off. Wouldn't the seal material be > more robust than to allow the lid to pop off? My concern is that we have > 120 of these all from one lot, and if there was a processing problem, then > maybe I have some other poorly bonded lids that may separate. Do you think > my concern is valid, or is this a one-off rare handling caused defect? > These are space grade parts. > > Thanks to Steve, a couple pictures are posted on the links below. I don't > know what could be determined from the first picture, other than yes, the > lid definitely popped off! The second picture shows another IC with a lid > slightly skewed, but within tolerance I believe. Thanks in advance for any > suggestions you can offer. > > http://stevezeva.homestead.com/RH1078MJ8-1.jpg > http://stevezeva.homestead.com/RH1078MJ8-2.jpg > > Howard A. Watson > > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the Symantec Email Security.cloud service. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________