Patent ID: 6030884
Filing Date: 2000-02-29
Classification: H01L,Y10S

Abstract:
A method for bonding a III-V group compound semiconductor layer to a silicon layer, said III-V group compound semiconductor layer having a different thermal expansion coefficient from a thermal expansion coefficient of said silicon layer and having a different rigidity coefficient from a rigidity coefficient of said silicon layer, said method comprising the steps of:preparing an intermediate layer on said III-V group compound semiconductor layer;preparing a first contact layer of one of In and Sb on said intermediate layer;preparing a second contact layer of said one of In and Sb on said silicon layer;contacting said first and second contact layers together to form a bonding interface; andsubjecting said intermediate, silicon, first and second contact layers, and III-V group compound semiconductor layers to a heat treatment at a temperature not less than 450.degree. C.;wherein said intermediate layer comprises a strained semiconductor layer capable of preventing a threading dislocation to extend through said strained layer into said III-V group compound semiconductor layer, said threading dislocation being caused by a thermal stress generated in said heat treatment and subsequent cooling stage due to the difference in the thermal expansion coefficient between said III-V group compound semiconductor layer and said silicon layer.