Patent ID: 7811911
Filing Date: 2010-10-12
Classification: B23K,H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming a layer including a semiconductor film over a glass substrate, wherein the glass substrate has a thermal expansion coefficient of greater than 6×10 heating the layer including the semiconductor film; and irradiating the layer including the semiconductor film with a pulsed ultraviolet laser beam having a width of less than or equal to 100 μm, a ratio of width to length of 1:500 or more, and a full width at half maximum of a laser beam profile of less than or equal to 50 μm so as to melt the semiconductor film and to grow crystal grains of the semiconductor film in a direction horizontal to the glass substrate, wherein the layer including the semiconductor film has total stress of greater than or equal to −500 N/m and less than or equal to +50 N/m.