Patent ID: 7607560
Filing Date: 2009-10-27
Classification: B23K,H01J,H01L

Abstract:
1. The method of manufacturing a high vacuum tube in which a semiconductor die is bonded onto an inner surface of a package comprising: creating multiple bonding pads at a first surface of a die, creating multiple matching bonding pads at the inner surface of the package, said package comprising a different material from said first surface of said die, placing between said sets of bonding pads a die bond material with a melting point of less than about 150° C., aligning the surfaces with said bonding pads together, placing a photocathode into a facing relationship with a second surface of said die, placing a spacer between said photocathode and said second surface of said die, and carrying said photocathode, said spacer, and said die while in a contacting relationship and aligned together through a brazing cycle and then through an ultra high vacuum processing cycle resulting in a sealed vacuum tube.