Abstract: A method for gettering metallic impurities located in a semiconductor substrate. In an exemplary embodiment of the invention, the method includes forming an insulating layer upon a donor wafer. A cleaving layer is ionically implanted, through the insulating layer, into the donor wafer. The cleaving layer is formed at a first depth with respect to the insulating layer. A gettering layer is also ionically implanted, through the insulating layer, into the donor wafer. The gettering layer is formed at a second depth with respect to said insulating layer, with second depth being less than the first depth. The donor wafer is then bonded, at the insulating layer, to a substrate wafer. The donor wafer is then fractured along the cleaving layer, and a section of the donor wafer is removed along the cleaving layer. Thereby, an active semiconductor device area is formed atop the gettering layer.

Abstract: A reservoir for power steering fluid includes an upright housing that forms an upper interior space for storage of a reserve fluid supply, and a lower interior space containing a fluid filter. Fluid connectors are provided for causing fluid to flow in a circumferential swirling pattern as it moves through the filter, such that the flowing fluid has a relatively long residence time in the lower portion of the reservoir for achievement of an effective cooling action. The fluid filter is connected in a return line form the power steering unit to the associated pump, so that the filter exerts a back pressure on fluid flowing from the power steering unit to the filter.

Abstract: A reservoir for power steering fluid includes an upright housing that forms an upper interior space for storage of a reserve fluid supply, and a lower interior space containing a fluid filter.* Fluid connectors are provided** for causing fluid to flow in a circumferential swirling pattern as it moves through the filter, such that the flowing fluid has a relatively long residence time in the lower portion of the reservoir for achievement of an effective cooling action. The fluid filter is connected in a return line from the power steering unit to the associated pump, so that filtered liquid is supplied to the pump. The fluid filter is preferably a flat disk-like filter unit located in a horizontal plane between the inlet fluid connector and the outlet fluid connector. *The upper interior space and lower interior space containing a fluid filter are separated by a frusto conical partition. Residence of the fluid above the frusto conical partition allows air entrained in the fluid to escape.