Abstract: An aqueous etchant composition containing about 0.01 to about 15 percent by weight of sulfuric acid and about 0.01 to about 20 percent by weight of hydrogen peroxide or about 1 to 30 ppm of ozone is effective in removing polymer residue from a substrate, and especially from an integrated circuit chip having aluminum lines thereon.

Abstract: A solenoid assembly for high-temperature service having a flanged housing, cover plate, and coil bobbin molded from high-temperature resistant thermosetting plastic. The coil terminals are located over lug projections integrally molded into the flanged portion of the housing to prevent pull-out. The coil bobbin is received in the housing and the cover plate interlocks axially thereover to capture the coil bobbin therein. The components are retained as an assembly by a surrounding pole frame.

Abstract: A plug-in fuse element comprises a one-piece plate-like body of fuse metal which forms parallel terminal blade portions having current-carrying extensions connected by a fuse link portion. For high current rated fuses, the fuse link portion extends between the current-carrying extensions at points much closer to the terminal blade portions than to the outer ends of the current-carrying extensions. An insulating body, preferably forming a housing, is rigidly anchored between the current-carrying extensions. The insulating body is preferably staked to the current-carrying extensions of the plug-in fuse element, there being anchoring apertures provided in the current-carrying extensions for the staking projections produced thereby. The anchoring apertures are located in the current-carrying extensions beyond the point where the fuse link portion joins the current-carrying extensions.

Abstract: A method for making plug-in fuse elements of different desired fuse ratings comprising the steps of providing a blank of fuse metal which is initially provided throughout its length with a continuous portion of reduced thickness having a fixed thickness dimension for making fuses of a variety of fuse ratings, and blanking the blank of fuse metal to contain a pair of laterally spaced terminal blade portions, current carrying extensions thereof and an interconnecting fuse link portion of reduced thickness having a fixed thickness dimension located in a platelike body of a plug-in fuse element. The interconnecting fuse link portions of fixed reduced thickness dimension, provided by the blanking of the blanks of fuse metal are arranged in desired locations and desired configurations including width and length dimensions, to provide the different desired fuse ratings.

Abstract: A method is disclosed for making a plug-in fuse assembly like that disclosed and claimed in U.S. Pat. No. 3,909,767, granted Sept. 30, 1975 for Miniature Plug-In Fuse and having different desired fuse ratings. The method comprises the steps of providing a blank of fuse metal which is initially provided throughout its length with a continuous central portion of reduced thickness having a fixed thickness dimension for making fuses of a variety of fuse ratings, and blanking the blank of fuse metal to contain a pair of laterally spaced coplanar terminal forming blade portions which are interconnected by a transverse web of reduced thickness having a fixed thickness dimension, coplanar current carrying extensions thereof and an interconnecting fuse-forming link portion of reduced thickness having a fixed thickness dimension located in a coplanar platelike body of a plug-in fuse element.