Patent ID: 6570259
Filing Date: 2003-05-27
Classification: H01L

Abstract:
An electrical package comprising components with compatible moduli of elasticity in order to reduce stress, said electrical package comprising:a) a substrate comprising an upper surface, said upper surface further comprising at least one electrical circuitry connecting pad; b) an electric device having a first modulus of elasticity and comprising upper and lower major surfaces separated by a predetermined thickness, said major surfaces defining a shape bounded by a perimeter, and said device comprising at least one connection region on said lower major surface; c) at least one flexible connector linking said at least one connecting pad to said at least one connection region; d) a collar element having a second modulus of elasticity and a first dimension and a second dimension, said first dimension comprising a length less than said device perimeter and at least a portion being bonded to said perimeter, and said second dimension being bonded to said substrate upper surface; and e) an adhesive material having a third modulus of elasticity no greater than said second modulus of elasticity of said collar element in order to relieve stress therebetween, said adhesive material adhering to at least a portion of said second side of said collar and to a portion of said upper surface of said substrate, thereby creating a unitary electrical package comprising said device, said substrate and said collar.