Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 5456627 | Conditioner for a polishing pad and method therefor An axially rotating circular polishing pad is conditioned by a rotating end effector that has an abrasion disc in contact with a polishing surface of the pad. The end effector moves along a radius of the polishing pad surface at a velocity that varies to ... | 10/10/1995 |
| 5257478 | Apparatus for interlayer planarization of semiconductor material A pad for planarizing the surface of a semiconductor wafer. The pad includes at least two layers. One layer has a hydrostatic modulus which is different from the hydrostatic modulus of the other pad.... | 11/02/1993 |
| 5144711 | Cleaning brush for semiconductor wafer Apparatus for cleaning an offset semiconductor wafer includes first and second opposed brushes circumscribing a common drive shaft. The wafer includes a circular peripheral edge. At any given instant, a first portion of the offset semiconductor wafer is p... | 09/08/1992 |
| 5095661 | Apparatus for transporting wafer to and from polishing head Apparatus for transporting a wafer into position against the pressure head of apparatus for polishing the wafer. The transport apparatus includes a dolly for positioning a wafer over a transport head assembly. The transport head assembly removes the wafer... | 03/17/1992 |
| 4944119 | Apparatus for transporting wafer to and from polishing head Apparatus for transporting a wafer into position against the pressure head of apparatus for polishing the wafer. The transport apparatus includes a dolly for positioning a wafer over a transport head assembly. The transport head assembly removes the wafer... | 07/31/1990 |
