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From: Robert Baer on 20 Jul 2010 01:46 whit3rd wrote: > On Jul 19, 12:55 am, Robert Baer <robertb...(a)localnet.com> wrote: >> For at least 30 years or more, a special ink has been used in the >> electronics industry for labeling transistors and ICs. >> That ink cannot be dissolved off the part > > It's more like paint than ink. The older units had > light markings on dark, the pigment was aluminum > (and it comes off with a little NaOH solution). > > New ICs have fine markings with no color contrast, > probably laser etched. Correct, laser marking is rather common now.
From: Robert Baer on 20 Jul 2010 01:48 mpm wrote: > On Jul 19, 2:55 am, Robert Baer <robertb...(a)localnet.com> wrote: >> For at least 30 years or more, a special ink has been used in the >> electronics industry for labeling transistors and ICs. >> That ink cannot be dissolved off the part, and it seems to not change >> color even at 230C or so. >> What type of ink is that, and what are the sources; eg: can anyone >> provide stocking disties, brand(s) part numbers, etc? >> Thanks. > > Sounds like you want an epoxy-based ink. > They also make them in high-temp. > > Try a search on ThomasNet.com > > -mpm Yes, i do need a hi-temp ink, as well as a hi-temp substrate maybe not unlike paper. Will try GooGull first, then TomNet next. Thanks.
From: Artemus on 20 Jul 2010 21:22 "Robert Baer" <robertbaer(a)localnet.com> wrote in message news:erudnVS93uZMmdnRnZ2dnUVZ_tOdnZ2d(a)posted.localnet... > For at least 30 years or more, a special ink has been used in the > electronics industry for labeling transistors and ICs. > That ink cannot be dissolved off the part, and it seems to not change > color even at 230C or so. > What type of ink is that, and what are the sources; eg: can anyone > provide stocking disties, brand(s) part numbers, etc? > Thanks. Markem has made marking equipment for decades. And inks. http://www.markem.com/products/index.jsp Art
From: Robert Baer on 21 Jul 2010 04:12 mpm wrote: > On Jul 19, 2:55 am, Robert Baer <robertb...(a)localnet.com> wrote: >> For at least 30 years or more, a special ink has been used in the >> electronics industry for labeling transistors and ICs. >> That ink cannot be dissolved off the part, and it seems to not change >> color even at 230C or so. >> What type of ink is that, and what are the sources; eg: can anyone >> provide stocking disties, brand(s) part numbers, etc? >> Thanks. > > Sounds like you want an epoxy-based ink. > They also make them in high-temp. > > Try a search on ThomasNet.com > > -mpm Turns out that the GooGull search using suggested terms, was more than sufficient.
From: Robert Baer on 21 Jul 2010 04:13
Artemus wrote: > "Robert Baer" <robertbaer(a)localnet.com> wrote in message > news:erudnVS93uZMmdnRnZ2dnUVZ_tOdnZ2d(a)posted.localnet... >> For at least 30 years or more, a special ink has been used in the >> electronics industry for labeling transistors and ICs. >> That ink cannot be dissolved off the part, and it seems to not change >> color even at 230C or so. >> What type of ink is that, and what are the sources; eg: can anyone >> provide stocking disties, brand(s) part numbers, etc? >> Thanks. > > Markem has made marking equipment for decades. > And inks. > http://www.markem.com/products/index.jsp > Art > > Will keep that in mind, if the sources i found do not work. |