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- Path: sparky!uunet!spool.mu.edu!olivea!inews.Intel.COM!sc9!bhouser
- From: bhouser@sc9.intel.com (Brad Houser)
- Newsgroups: sci.electronics
- Subject: Re: "The Glob" Atari 2600 processors ???
- Message-ID: <BzFE1K.369@inews.Intel.COM>
- Date: 17 Dec 92 22:48:54 GMT
- References: <1gp41fINN6h1@usenet.INS.CWRU.Edu>
- Sender: news@inews.Intel.COM (USENET News System)
- Reply-To: bhouser@sc9.intel.com
- Organization: Intel Corporation, California Technology Development
- Lines: 16
- Nntp-Posting-Host: libra
-
-
- The "Glob" is called "Chip on Board". It is an inexpensive way to package
- the silicon chip. The chip itelf is glued to the PCB, the bonding pads
- of the chip are wired to the traces using an automatic wire bonder, and
- then a hot glob of melted plastic is placed (globbed?) onto the chip.
-
- Why isn't this done more often? One reason is reliability. It is
- likely to be less reliable than conventional plastic packages.
-
- If it fails you basically replace the whole board. In a higher priced system,
- you wouldn't take a chance of hermetically sealing the processor chip to
- the board much like you wouldn't wave solder a 486.
- --
- [Brad Houser Home of Pentium (tm) ]
- [ bhouser@sc9.intel.com ]
- [+1-408-765-0494 Woof!]
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