Abstract: A method includes implanting impurities in a semiconductor substrate to form an etch stop region within the semiconductor substrate; forming a transistor structure on a front side of the semiconductor substrate; forming a front-side interconnect structure over the transistor structure; performing a thinning process on a back side of the semiconductor substrate to reduce a thickness of the semiconductor substrate, wherein the thinning process is slowed by the etch stop region; and forming a back-side interconnect structure over the back side of the semiconductor substrate.

Abstract: A shredding machine includes a plurality of locating plates respectively mounted on two revolving axles between two side frames, pairs of spring washers respectively mounted on the revolving axles between each two locating plates to hold a respective annular cutter for cutting inserted paper into shreds upon the operation of a motor to rotate the revolving axles through a transmission gear train, two support rods connected in parallel between the side frames at two sides, and two locating frames connected between the side frames and respectively supported on the support rods, the locating frames each having a protruded middle portion engaged into a retaining notch of each of the locating plates to stop the locating plates from rotation with the revolving axles and to further stop the annular cutters from deformation during cutting.

Abstract: A shredding machine includes cutter holders and washers mounted in a base frame to hold two sets of circular cutters on two parallel shafts, a motor adapted to rotate the shafts through a transmission gear set, and baffle means installed in the base frame to support the cutter holders and to protect the circular cutters from deformation,_the cutter holders each having an invertedly disposed T-shaped holder body, at least one through hole for the passing of the revolving shafts, and pulleys disposed at different elevations and supported on the revolving shafts at top and bottom sides.

Abstract: A shredding machine includes a plurality of locating plates respectively mounted on two revolving axles between two side frames, pairs of spring washers respectively mounted on the revolving axles between each two locating plates to hold a respective annular cutter for cutting inserted paper into shreds upon the operation of a motor to rotate the revolving axles through a transmission gear train, two support rods connected in parallel between the side frames at two sides, and two locating frames connected between the side frames and respectively supported on the support rods, the locating frames each having a protruded middle portion engaged into a retaining notch of each of the locating plates to stop the locating plates from rotation with the revolving axles and to further stop the annular cutters from deformation during cutting.

Abstract: A motor-driven eyeleting machine includes two end eyeleting rod holders and two middle eyeleting rod holders respectively holding a respective eyeleting rod at one side of a revolving axle, two end cam wheels fixedly mounted on the revolving axle and rotated with the revolving axle to reciprocate the eyeleting rods in the end eyeleting rod holders respectively, two middle cam wheels respectively mounted on the revolving axle and adapted to reciprocate the eyeleting rods in the middle eyeleting rod holders selectively, and a shifter coupled to the middle cam wheels and shifted between two positions to alternatively set one middle cam wheel in the working position and the other middle cam wheel in the idle position.

Abstract: A shredding machine includes cutter holders and washers mounted in a base frame to hold two sets of circular cutters on two parallel shafts, a motor adapted to rotate the shafts through a transmission gear set, and baffle means installed in the base frame to support the cutter holders and to protect the circular cutters from deformation,_the cutter holders each having an invertedly disposed T-shaped holder body, at least one through hole for the passing of the revolving shafts, and pulleys disposed at different elevations and supported on the revolving shafts at top and bottom sides.