Patent ID: 6396706
Filing Date: 2002-05-28
Classification: H05K

Abstract:
An apparatus for holding and regulating a temperature of a first integrated circuit (IC) package (36) and a second IC package (38), the apparatus comprising:a substrate (26,28,30) having an upper surface upon which said first IC package is mounted, said substrate comprising electrically insulating material; a first heating element (32) embedded in said substrate below said first IC package for generating first heat in response to a voltage applied to said first heating element, said first heat traveling through said substrate to said first IC package and warming said first IC package, and temperature regulation means (76, 78, 80) for monitoring a first temperature of said first IC package and for applying said voltage across said first heating element when said temperature falls below a first minimum level and for removing said voltage from said first heating element when said first temperature rises above a first maximum level, wherein said first maximum level is at least as high as said first minimum level.