Patent ID: 8081384
Filing Date: 2011-12-20
Classification: B82Y,C03C,C23C,G02B,G03F

Abstract:
1. A multilayer reflective film coated substrate, comprising: a multilayer under film, which consists of a first plurality of Mo/Si alternately-layered films and is formed on a substrate, the first plurality of Mo/Si alternately-layered films being formed by alternately laminating a first combination of a Si layer and a Mo layer as one cycle so that a cycle length of the multilayer under film is given as d bottom (unit:nm), the cycle length of each said first plurality of Mo/Si alternately-layered films being substantially the same, the first combination of the Si layer and the Mo layer being obtained by laminating the Si layer and the Mo layer in this order from a substrate side, an intermediate layer which is made of only a Si film, and formed in direct contact with the multilayer under film, thickness of the intermediate layer is d Si (unit:nm), and a multilayer reflective film, which consists of a second plurality of Mo/Si alternately-layered films for reflecting exposure EVU light, and is formed in direct contact with the Si film as the intermediate layer, the second plurality of Mo/Si alternately-layered films being formed by alternately laminating a second combination of an Si layer and a Mo layer as one cycle so that a cycle length of the multilayer reflective film is given as d top (unit:nm), the cycle length of each said second plurality of Mo/Si alternately-layered films being substantially the same, wherein the thickness of the intermediate layer d Si is different from the thickness of the Si film in both the under film and the multilayer reflective film, and relationships of a formula (1) and formula (2) are satisfied, the formula (1) being given by where n is a natural number equal to or greater than 1, and the formula (2) being given by where m is a natural number equal to or greater than 1, and wherein the d top is 6.9 to 7.1 nm and ΓMo (where ΓMo is an apparent layer thickness of a Mo layer within a cycle of the Mo/Si alternately-layered film/cycle length) is 0.35 to 0.45 in the multilayer reflective film.