Patent ID: 8152583

Claim:
A manufacturing method of an organic EL display device comprising the steps of: adhering a mother element substrate on which a plurality of element substrates are formed to a mother seal substrate on which a plurality of seal substrates are formed via an adhesive sheet, wherein the element substrates include a first element substrate, having a first display region and a first terminal portion, and a second element substrate having a second display region and a second terminal portion, and wherein the first terminal portion exists between the first display region and the second display region, wherein the adhesive sheet formed as a single continuous sheet includes an adhesive sheet cut portion which extends to reach and define an end portion of the adhesive sheet: forming a mother panel by adhering, via the adhesive sheet, the mother element substrate to the mother seal substrate at a portion other than the first terminal portion formed on the element substrate corresponding to the adhesive sheet cut portion so that the first terminal portion is not covered by the adhesive sheet; and separating the mother panel into the organic EL display devices each having the element substrate and the seal substrate.