Semiconductor wafer having identification indication and method of manufacturing the same
First Claim
1. A semiconductor wafer comprising a semiconductor wafer identification indication on a selected side surface portion of the semiconductor wafer to remain after performing the semiconductor wafer abrading treatment from a rear side for making the semiconductor wafer thinner, wherein a side surface of the semiconductor wafer includes an upper slant face portion elongating from a front surface, a lower slant face portion elongating from a rear surface, and a peripheral surface portion between the slant face portion elongating from the front surface and the slant face portion elongating from the rear surface, and the selected side surface portion is the slant face portion elongating from the front surface.
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Accused Products
Abstract
An identification indication is formed on a side surface of a semiconductor wafer, and thus even if various treatment processes are repeatedly conducted for forming a semiconductor circuit, or even by the wrapping treatment on the rear side of the wafer, the identification indication cannot disappear or become unclear so that the identification indication can be clearly recognized at least until the process for cutting the wafer into chips.
67 Citations
26 Claims
- 1. A semiconductor wafer comprising a semiconductor wafer identification indication on a selected side surface portion of the semiconductor wafer to remain after performing the semiconductor wafer abrading treatment from a rear side for making the semiconductor wafer thinner, wherein a side surface of the semiconductor wafer includes an upper slant face portion elongating from a front surface, a lower slant face portion elongating from a rear surface, and a peripheral surface portion between the slant face portion elongating from the front surface and the slant face portion elongating from the rear surface, and the selected side surface portion is the slant face portion elongating from the front surface.
- 3. A semiconductor wafer comprising a semiconductor wafer identification indication on a selected side surface portion of the semiconductor wafer to remain after performing a semiconductor wafer abrading treatment from a rear side for making the semiconductor wafer thinner, wherein the side surface of the semiconductor wafer includes an upper slant face portion elongating from a front surface, a lower slant face portion elongating from a rear surface, and a peripheral surface portion between the slant face portion elongating from the front surface and the slant face portion elongating from the rear surface, and the selected side surface portion is a portion at a side adjacent to the slant face portion elongating from the front surface.
- 5. A semiconductor wafer structure comprising a semiconductor wafer having an identification indication formed either on a slant surface elongating from a front surface or a back surface of the semiconductor wafer or on a peripheral surface elongating from a slant surface of the semiconductor wafer.
- 15. A semiconductor wafer structure comprising a semiconductor wafer having an indentification indication formed on a side surface except for a portion elongating from a front surface and a portion elongating from a back surface of the semiconductor wafer.
- 25. A semiconductor wafer structure comprising a semiconductor wafer having a front surface, a back surface and a side surface located between the front surface and the back surface, the side surface having an upper slant portion extending from the front surface to a peripheral surface portion and a lower slant portion extending from the back surface to the peripheral surface portion, the peripheral surface located between the upper slant portion and the lower slant portion, said semiconductor wafer further including an identification indication formed on the side surface.
Specification