Patent ID: 8318599

Claim:
A resin layer formation method comprising: forming, over a substrate with a first electrode formed thereon, a first resin layer including a first substance for decreasing a thermal expansion coefficient so as to bury the first electrode, the first resin layer having the first substance localized in the side thereof nearer to the substrate, the first resin layer including a first layer and a second layer formed on the first layer, a content ratio of the first substance in the second layer being lower than that of the first layer; cutting both of the second layer and an upper part of the first electrode with a cutting edge of a cutting tool to planarize a surface of the first resin layer; forming an interconnection over the first resin layer; forming a second electrode over the interconnection; forming, over the first resin layer with the interconnection and the second electrode formed thereon, a second resin layer including a second substance for decreasing a thermal expansion coefficient so as to bury the interconnection and the second electrode, the second resin layer having the second substance localized in the side thereof nearer to the substrate, the second resin layer including a third layer and a fourth layer formed on the third layer, a content ratio of the second substance in the fourth layer being lower than that of the third layer; cutting both of the fourth layer and an upper part of the second electrode with a cutting edge of a cutting tool to planarize a surface of the second resin layer.