Patent ID: 8841186

Claim:
A method of manufacturing a semiconductor device ( 12 ) comprising the steps ( 112 , 114 , 116 ) of forming at least one wall ( 33 ) of a body ( 44 ) of the semiconductor device ( 12 ) by etching ( 112 ) at least one trench ( 22 ) for a gate ( 42 ) of the semiconductor device ( 12 ) into the body ( 44 ); performing a slanted implantation doping ( 126 , 128 ) into the at least one wall ( 33 ) of the body ( 44 ), after the etching ( 112 ) of the at least one trench ( 22 ) and prior to coating ( 116 ) the at least one trench ( 22 ) with an insulating layer ( 29 ); wherein the step ( 114 ) of performing the implantation doping ( 126 , 128 ) comprises a first ( 126 ) and a second ( 128 ) step of implantation doping, wherein in the second step of implantation doping ( 128 ) energy is employed which is one of greater than and lower than a first energy employed in the first step of implantation doping ( 126 ), wherein the first step of implantation doping ( 126 ) is performed with a first azimuth (β 1 ) and then repeated with a second azimuth (β 2 ), wherein subsequently the second step of implantation doping ( 128 ) is one of: at first performed with the first azimuth (β+ 1 ) and then repeated with the second azimuth (β 2 ); and at first performed with the second azimuth (β 2 ) and then repeated with the first azimuth (β 1 ), wherein the first azimuth (β+ 1 ) is an angle (β+ 1 ) between a slot-direction (β 0 ) of the at least one trench ( 22 ) and a direction of an implantation beam ( 71 , 72 ), wherein the second azimuth (β 2 ) is an angle (β 2 ) between the slot-direction (β 0 ) of the at least one trench ( 22 ) and a direction of an implantation beam ( 73 , 74 ), and wherein the two azimuths (β+ 1 , β 2 ) have a same absolute value but are different in sign.