Patent ID: 11973100
Assignee: SK HYNIX INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method for forming an image sensing device comprising:
forming an inner grid layer over a substrate that supports an image sensing array of photoelectric conversion elements, the substrate including the photoelectric conversion elements;
forming a sacrificial film over the inner grid layer;
patterning the sacrificial film to form a sacrificial film pattern that covers side and top surfaces of the inner grid layer;
forming a capping film to cover the sacrificial film pattern so that the capping film and the inner grid layer enclose the sacrificial film pattern; and
removing the sacrificial film pattern to form a void space between the capping film and the inner grid layer as part of a grid structure for the image sensing array,
wherein the sacrificial film pattern is removed while enclosed by the capping film and the inner grid layer to prevent exposure to an outside.