HCC> I can not see whether the BTW21 has a plastic or glass window. It HCC> lookes molded, but that can be done before the chip was encapsulated. HCC> The window is rather hard because I can not scratch it with a steel HCC> pin. So glass is probable. It does not look epoxy filled. The shadow HCC> of the rim moves over the bottom and you cannot see refraction HCC> fenomena. Also inside it looks very bright.
HCC> regards, Harry The windowed metal cans are soldered to the bottom plate after the chip is mounted. Therefore a plastic lens cannot be used and filling the void with anything but air (or dry nitrogen) is both unnecessary and costly. Uwe. -- Author: Uwe Zimmermann INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
