| 摘要 |
<p>PURPOSE:To obtain the mask for exposing which is less changed by temp. and humidity, allows exposing with high accuracy and can be inexpensively produced. CONSTITUTION:This mask 1 for exposing is used to form resist patterns for etching, etc., at the time of producing printed circuit boards and is constituted by laminating a film base material 2 formed with an emulsion layer 3 on a glass base material 5, fixing the base materials by an adhesive layer 6 and forming patterns 4 for exposing on the emulsion layer 3.</p> |
