Abstract: A plastic package for microwave applications up to 14 Ghz is disclosed. The plastic package includes a plastic platform, a lead frame embedded on the surface of the platform and, in one embodiment, a plastic cap mounted on the platform so as to seal the chip within the package. The lead frame includes a baseplate for mounting at least one semiconductor chip, at least one ground lead attached to the baseplate and extending outwardly therefrom, and at least one signal lead for conducting signals to or from such semiconductor chip. The signal lead and at least one ground lead are configured as a microwave transmission line such as microwave coplanar strips, or microwave coplanar waveguide for transmitting microwave frequency signals. The package offers a low inductance ground path, good thermal characteristics, and low parasitic inductance and capacitance. It can be applied for high speed and high frequency applications.

Abstract: A polymer cage for a tapered roller bearing has the usual large and small end rings and bridges which connect the end rings to form pockets which receive the tapered rollers, so that the rollers are spaced properly and further will be held against the cone when the cone is removed from the cup. The cage, however, is constructed such that when it and the rollers are subjected to a jet of high velocity air, the cage and the roller set will not spin rapidly around the cone. This is achieved by detaching one of the bridges from one of the end rings so that the bridge and the rollers adjacent to the bridge will move outwardly during rotation or by providing at least one of the bridges with an outwardly directed rib. In either case, the balance of the cage is disrupted and its wind resistance is increased. As a result, the cage will not revolve at a high velocity when subjected to a jet of air.