Patent ID: 7790555

Claim:
A semiconductor device manufacturing method, comprising: a field oxide insulation film forming step comprising: subjecting a surface of a semiconductor substrate to local oxidization; forming on the surface of the semiconductor substrate a field oxide insulation film that swells at positions along the surface of the semiconductor substrate; and dividing the surface of the semiconductor substrate into a plurality of active regions using the field oxide insulation film; an electrode forming step comprising: forming an electrode film on the surface of the semiconductor substrate; applying a first photoresist on a surface of the electrode film by spin-coating; exposing the first photoresist to light; and etching and removing an unnecessary portion of the electrode film to form an electrode; and a resistor forming step comprising: forming a resistor film on the surface of the semiconductor substrate; applying a second photoresist on a surface of the resistor film by spin-coating; exposing the second photoresist to light; and etching and removing an unnecessary portion of the resistor film to form a resistor; wherein the field oxide insulation film forming step comprises forming the field oxide insulation film so that a portion which corresponds to a side surface portion for each of the active regions, which opposes a rotation center of the surface of the semiconductor substrate for the spin-coating of the first photoresist in the electrode forming step, and which is located at a front side of a centrifugal force acting direction along the surface of the semiconductor substrate, has a curved surface that is convex in a forward direction of the centrifugal force along the surface of the semiconductor substrate as seen in plan view of the semiconductor substrate.