Patent ID: 9580791
Date: 2017-02-28
CPC Classifications: B05C,C23C,C23F,H01L

Claim:
1. A vapor deposition mask for forming a coating film having a predetermined pattern on a substrate by causing vapor deposition particles to adhere to the substrate, wherein a plurality of mask openings through which the vapor deposition particles pass are formed in the vapor deposition mask, a relative position between a vapor deposition source that discharges the vapor deposition particles and the vapor deposition mask is constant, and the mask openings overlap the vapor deposition source directly above the vapor deposition source, the vapor deposition mask includes a first layer, a second layer and a third layer in this order from a side of the substrate, a plurality of first openings, a plurality of second openings and a plurality of third openings are formed respectively in the first layer, the second layer and the third layer, the first openings, the second openings and the third openings are configured to communicate with each other, thereby constituting the mask openings, an opening dimension of the second openings is larger than an opening dimension of the first openings and is larger than an opening dimension of the third openings, the opening dimension of the first openings is larger than the opening dimension of the third openings, and the first layer and the third layer of the vapor deposition mask are made of polyimide.