Patent ID: 8092277

Claim:
A method of grinding semiconductor wafers, comprising: simultaneously grinding both surfaces of multiple semiconductor wafers being ground by rotating the multiple semiconductor wafers between a pair of upper and lower rotating surface plates in a state where the multiple semiconductor wafers are held on a carrier such that centers of the multiple semiconductor wafers are positioned on a circumference of a single circle, wherein: a ratio of an area of a circle passing through the centers of the multiple semiconductor wafers to an area of one of the multiple semiconductor wafers is greater than or equal to 1.33 but less than 2.0; the rotating surface plates comprise fixed abrasive grains; and surfaces of the fixed abrasive grains are comprised of pellets disposed in a grid-like fashion, with the pellets provided in a center portion and pellets provided in a peripheral portion being larger in size than the pellets provided in an intermediate portion between the center portion and the peripheral portion.