Laser EC Sites With Transparent Substrates
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-08
The use of an optically transparent sapphire substrate in Josephson technology will allow laser modification techniques to be used for Josephson chip engineering changes without the necessity of chip removal. Sapphire has an expansion coefficient that matches that of lead wiring more closely than that of silicon and is less susceptible to hillock formation than silicon. Also, sapphire is a close match to other super-conductors, such as niobium, and has a high coefficient of heat conductivity.