Abstract: A part is stamped from a steel sheet having a textured surface. The stamped part is coated with a zinc layer. The zinc layer is coated with a chromate conversion layer, either yellow-colored or black-colored. Preferably, the textured surface is produced by embossing the steel sheet. Alternatively, the textured surface is produced by etching, shot peening, or sand blasting the sheet steel. An exterior surface comprised of at least some of the textured surface of the part, as coated with such layers, has a finish simulating the similarly-colored, textured finish that the part would have if the part were stamped from a steel sheet so that the part would have a smooth, exterior surface and if the smooth, exterior surface were to be electrostatically coated with a black-colored, epoxy powder, which would be heat-cured.

Abstract: A heat sink for an electronic apparatus is disclosed, which comprises a base member and a finned member. The base member has a contact surface, which may be planar. The finned member has fins spaced from one another by webs unitary with the flanges. The finned member is secured to the base member so that each web covers an adjacent portion of the contact surface of the base member. A heat-conductive material is interposed between each web and the adjacent portion of the contact surface of the base member. In a preferred embodiment, the finned member has tabs projecting through slots in the base member and bent so as to secure the finned member mechanically to the base member. Moreover, in the preferred embodiment, the finned member has two lateral flanges and the base member has two lateral flanges, each of which is crimped around one of the lateral flanges og the finned member so as further to secure the finned member mechanically to the base member.