Patent ID: 8558947

Claim:
A solid-state image pickup element, comprising: a plurality of pixels each having a photoelectric conversion portion for converting a quantity of incident light into an electric signal, and a plurality of pixel transistors; wiring layers formed on one surface side of a semiconductor substrate having said plurality of pixels formed therein, light made incident from a side opposite to the one surface having said wiring layers formed thereon being received by corresponding one of the photoelectric conversion portions; a scribe line region in a periphery of a pixel portion composed of said plurality of pixels; and square-shaped termination detecting portions for determining a polishing termination, each having higher hardness than that of said semiconductor substrate and formed in the scribe line region, and at least a portion of the termination detecting portions being formed at a same depth in the substrate as the photoelectric conversion portions and having a top surface exposed by polishing such that the top surface of the square-shaped termination detecting portions is at a same level as a surface of the substrate; wherein each of said square-shaped termination detecting portions has a side parallel with a direction of said scribe line of said semiconductor substrate.