I've never heard of programmable logic that uses a laser; that would require elaborate equipment and defeat the entire purpose of having customizable logic.
Techniques I know of include UV-erasable (hence the window), fuse-based (on-time-programmable, aka OTP), Electrically-erasable, and RAM-based, which requires an offchip storage device (usually serial EEprom). There were all sorts of inexpensive programmable devices in the 1980's, including the popular 22V10. You would use software, such as CUPL or PALASM to generate the fusing/programming information, then use a programming machine (DataIO was one such manufacturer) to program the device. Laser-trimming of resistors was once common for precision analog parts; I think it's been largely replaced with fuses. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/1489f4ca-9624-4efc-a7ec-105fe64560e5%40googlegroups.com.
