Patent ID: 7785994

Claim:
A semiconductor device manufacturing method for emitting an ion beam to form impurity layers in multiple semiconductor substrates while a plate-shape support on which multiple semiconductor substrates are mounted in an annular form around a rotation center is rotated about the rotation center, comprising the steps of: forming a first mask pattern having an opening over a region in which a first impurity layer is formed on the multiple semiconductor substrates having an element isolation region consisting of an insulation material and the opening edge positioned on the element isolation region; emitting an ion beam to implant a first conductivity type impurity in the multiple semiconductor substrates while the support on which multiple semiconductor substrates each having the first mask pattern are mounted is positioned in a manner that a first angle is made between a plane perpendicular to an ion beam injection direction and a line perpendicular to a line passing through an ion beam irradiation point and the rotation center in a rotation plane of the support and rotated about the rotation center; forming a second mask pattern having an opening over a region in which a second impurity layer is formed on the multiple semiconductor substrates and the opening edge positioned on the element isolation region; emitting an ion beam to implant a second conductivity type, which is the conductivity type opposite to the first conductivity type, impurity in the multiple semiconductor substrates while the support on which multiple semiconductor substrates each having the second mask pattern are mounted is positioned in a manner that a second angle is made between the plane perpendicular to the ion beam injection direction and the line perpendicular to the line passing through the ion beam irradiation point and the rotation center in the rotation plane of the support and rotated about the rotation center; emitting an ion beam to implant the first conductivity type impurity in the multiple semiconductor substrates while the support on which multiple semiconductor substrates each having the first mask pattern are mounted is positioned in a manner that the second angle is made between the plane perpendicular to the ion beam injection direction and the line perpendicular to the line passing through the ion beam irradiation point and the rotation center in the rotation plane of the support and rotated about the rotation center; and emitting an ion beam to implant the second conductivity type impurity in the multiple semiconductor substrates while the support on which multiple semiconductor substrate each having the second mask pattern are mounted is positioned in a manner that the first angle is made between the plane perpendicular to the ion beam injection direction and the line perpendicular to the line passing through the ion beam irradiation point and the rotation center in the rotation plane of the support and rotated about the rotation center.