Patent ID: 7811901
Filing Date: 2010-10-12
Classification: H01L

Abstract:
1. A method for fabricating a silicon on substrate structure having smooth edge regions, the method comprising: providing a silicon donor substrate, the silicon donor substrate having a surface region and a backside region, a substrate thickness being provided between the surface region and the backside region; co-implanting a plurality of first particles having a first dose through the surface region into a vicinity of a cleave region and a plurality of second particles having a second dose through the surface region into the vicinity of the cleave region to define a thickness of material to be removed between the cleave region and the surface region, the first dose and the second dose cumulating to a total dose and a dose fraction, the dose fraction between the first particles relative to the total dose; joining the surface region of the silicon donor substrate to a handle substrate to form a coupled substrate structure; processing the coupled substrate structure using a thermal treatment process; placing the coupled substrate structure into a cleaving chamber; initiating a cleaving action at an edge region of the coupled substrate structure to begin to detach the thickness of material at the edge region toward a center region of the thickness of material; removing the thickness of material to free the thickness of material from a remaining portion of the coupled substrate structure to form an edge region of the thickness of material having an edge profile characterized by being free from one or more particles derived from one or more portions of the thickness of material capable of being broken off and causing a defect, the one or more particles having a dimension of greater than about 0.1 micron according to a specific embodiment.