Patent ID: 11960690
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. The method of claim 12, wherein the view area comprises a first region, a second region and a third region which are connected,
the splicing exposure process performed on the light-shielding film by using the fourth mask comprises a first exposure for the first region, a second exposure for the second region and a third exposure for the third region,
during the first exposure, an edge of the second light-transmissive portion of the fourth mask close to the first light-transmissive portion is aligned with a left edge of the first region, an edge of the third light-transmissive portion of the fourth mask close to the fourth light-transmissive portion is aligned with an upper edge of the first region, and an edge of the fourth light-transmissive portion of the fourth mask close to the third light-transmissive portion is aligned with a lower edge of the first region,
during the second exposure, the edge of the third light-transmissive portion of the fourth mask close to the fourth light-transmissive portion is aligned with an upper edge of the second region, the edge of the fourth light-transmissive portion of the fourth mask close to the third light-transmissive portion is aligned with a lower edge of the second region, and the edge of the second light-transmissive portion of the fourth mask close to the first light-transmissive portion is offset to the left relative to an edge of the first light-transmissive portion of the fourth mask close to the second light-transmissive portion during the first exposure by a distance greater than 0 and smaller than (3L−W), where W is the preset width of the view area of the touch substrate, and L is a distance from the edge of the first light-transmissive portion of the fourth mask close to the second light-transmissive portion to the edge of the second light-transmissive portion close to the first light-transmissive portion, and
during the third exposure, the edge of the first light-transmissive portion of the fourth mask close to the second light-transmissive portion is aligned with a right edge of the third region, the edge of the third light-transmissive portion of the fourth mask close to the fourth light-transmissive portion is aligned with an upper edge of the third region, and the edge of the fourth light-transmissive portion of the fourth mask close to the third light-transmissive portion is aligned with a lower edge of the third region.