Patent ID: 9146481
Filing Date: 2015-09-29
Classification: G03F,H01L

Abstract:
1. A local exposure apparatus for performing exposure processing on a specific area of a photosensitive film formed on a metal layer of a substrate, the photosensitive film having a thick portion and a thin portion, the apparatus comprising: a substrate conveying unit configured to form a substrate conveying path and to horizontally convey the substrate along the substrate conveying path at a specified substrate conveying speed; a chamber configured to surround a part of the substrate conveying path and to form an exposure processing space in which the substrate is subjected to the exposure processing; a light source including a plurality of light-emitting elements linearly arranged in a direction intersecting a substrate conveying direction above the substrate conveying path within the chamber, the light source being capable of illuminating the photosensitive film on the substrate conveyed below the light source with lights emitted from the plurality of light-emitting elements; a light emission drive unit configured to selectively drive one or more of the plurality of light-emitting elements of the light source as a single light emission control unit; a substrate detecting unit arranged at an upstream side of the light source in the substrate conveying path and configured to detect the substrate conveyed by the substrate conveying unit; and a control unit configured to receive a substrate detection signal from the substrate detecting unit and to control the light emission drive unit to drive the plurality of light-emitting elements, wherein the control unit is configured to find a conveying position of the substrate based on the substrate detection signal from the substrate detecting unit and the substrate conveying speed and control the light emission drive unit such that, when the thin portion of the photosensitive film formed on the metal layer of the substrate moves below the light source, one or more of the plurality of light-emitting elements capable of illuminating the thin portion having a film thickness being thicker than a predetermined film thickness are driven to emit the lights thereby reducing the film thickness of the thin portion based on reference data having two-dimensional coordinate values and a film thickness reduction value corresponding to the thin portion having the film thickness being thicker than the predetermined film thickness, wherein the local exposure apparatus is arranged before or after an exposure processing apparatus, the exposure processing apparatus configured to perform further exposure process, and wherein the reference data is obtained by measuring a residual resist film thickness, a line width of wiring patterns and a pitch between the wiring patterns in a plane of each of sampling substrates exposure-processed by the exposure processing apparatus.