Patent ID: 9017932
Filing Date: 2015-04-28
Classification: G03F,H01L,Y10T

Abstract:
1. A method for manufacturing a processed substrate, the method comprising: (i) forming a pattern in a first photosensitive resin layer and a second photosensitive resin layer, the first photosensitive resin layer being disposed on a first surface of a light transmissive substrate, and the second photosensitive resin layer being disposed on a second surface of the light transmissive substrate, the pattern being formed in each of the first and second photosensitive resin layers by selectively exposing the first and second photosensitive resin layers to light, and the pattern corresponding to a pattern of a plurality of through-holes to be formed; and (ii) forming the plurality of through-holes by boring the light transmissive substrate, based on the pattern formed in each of the first and second photosensitive resin layers, wherein said forming the pattern includes: selectively exposing each of the first and second photosensitive resin layers to light, by irradiating the first surface of the light transmissive substrate with the light which then passes through to the second surface of the light transmissive substrate, and performing development of the first and second photosensitive resin layers, wherein the first photosensitive resin layer disposed on the first surface of the light transmissive substrate has a thickness of at least 20 μm but not greater than 200 μm, and the second photosensitive resin layer disposed on the second surface of the light transmissive substrate has a thickness of at least 40% but not greater than 70% of the thickness of the first photosensitive resin layer disposed on the first surface of the light transmissive substrate.