Hmm..I've read about that baking in conjunction with 1702A too..but don't remember the source of that discussion. I know that ppl suggested it for proms that would'nt program correctly...
Regards, Holm dwight via cctalk wrote: > When I was at Intel, years ago, I recall the baking was only to repair the > retention of the EPROMs. It was not to fix random failures. > > It sounds like your EPROMs have various failures that wouldn't be helped by > baking. > > Each time the EPROM is programmed, there is a slight increase in the leakage > of the floating gate. This was typical after thousands of program/erase > cycles. Baking them repaired the damage to the insulating layer that was > damaged. > > Dwight > > > ________________________________ > From: cctalk <cctalk-boun...@classiccmp.org> on behalf of william degnan via > cctalk <cctalk@classiccmp.org> > Sent: Wednesday, December 13, 2017 6:18:16 AM > To: Mark G Thomas; General Discussion: On-Topic and Off-Topic Posts > Subject: Re: EPROM baking > > On Wed, Dec 13, 2017 at 9:08 AM, Mark G Thomas via cctalk < > cctalk@classiccmp.org> wrote: > > > Hi, > > > > I am working on several projects requiring 2708 and 2716 EPROMs, and > > am finding some of my chips will not erase, and some will not take > > a program. I've also learned more in the past week than I wanted > > to know about repairing Data-I/O 29a/b programmers. > > > > I vaguely remember in the 1990s baking such EPROMs in the oven, but > > I do not remember temperature or time. I was surprised that Google > > didn't turn up anything useful with this info. > > > > I'm sure someone here will have some notes on EPROM baking. > > > > Mark > > > > > > > > Mark, > > If this is an issue about reviving bad eproms? I assume you have tried the > regular stuff. > > What process are you using now to erase 2708/16's? I have a simple eraser > unit and it seems to always work. Some eproms go bad but I never have > issues with erasing them. My point is that maybe you need a better prom > eraser unit. I would avoid baking them until you have exhausted other > options. Not sure what others think. This topic has come up before here, > about putting them outside and all that. The erasers are all over ebay, > and the hardware store is full of the correct types of lighting, why not > make a box that will do the job? I assume there is more to it that > simply erasing them. > > > Bill -- Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, Freiberger Straße 42, 09600 Oberschöna, USt-Id: DE253710583 i...@tsht.de Fax +49 3731 74200 Tel +49 3731 74222 Mobil: 0172 8790 741