Patent ID: 9263498
Filing Date: 2016-02-16
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, comprising: (a) providing a semiconductor substrate having a first conductivity type; (b) after the step (a), forming, in the semiconductor substrate, a first semiconductor region having a second conductivity type opposite to the first conductivity type and forming a part of a photodiode; (c) forming, over the semiconductor substrate, a gate electrode of a transfer transistor which transfers charges generated by the photodiode; (d) forming a second semiconductor region having the first conductivity type and forming the other part of the photodiode such that the second semiconductor region is included in the first semiconductor region; (e) after the step (d), applying a microwave to the semiconductor substrate to heat the semiconductor substrate; (f) after the step (e), forming, in the semiconductor substrate, a drain region of the transfer transistor; (g) after the step (f), forming an interlayer insulating film over the semiconductor substrate; (o) forming a contact hole extending through the interlayer insulating film to reach the drain region; (p) filling the contact hole with a conductor film to form a plug; (q) after the step (p), forming an interconnect layer over the interlayer insulating film; (r) after the step (q), attaching a supporting substrate to the semiconductor substrate; and (s) after the step (r), grinding a back surface of the semiconductor substrate.