Abstract: The polishing solution is useful for preferentially removing barrier materials in the presence of nonferrous interconnect metals with limited erosion of dielectrics. The polishing solution comprises 0 to 20 weight percent oxidizer, at least 0.001 weight percent inhibitor for reducing removal rate of the nonferrous interconnect metals, 10 ppb to 4 weight percent complexing agent, 0 to 50 weight percent abrasive and balance water; and the solution having a pH of less than 7.

Abstract: The present invention provides a multi-step aqueous composition useful for polishing a tantalum barrier material and copper from a semiconductor wafer, comprising by weight percent 0.1 to 30 oxidizer, 0.01 to 3 inorganic salt or acid, 0.01 to 4 inhibitor, 0.1 to 30 abrasive, 0 to 15 complexing agent and balance water, wherein the aqueous composition has a pH between 1.5 to 6.

Abstract: A multi-radio equipment arrangement comprises multiple transceivers of different band splits. A preferred arrangement utilizes at least one transceiver for communicating on digital "trunked" RF communications system and at least one transceiver for communicating on a wide-area "conventional" RF communications system. The multi-radio equipment transceivers communicate with each other and with an equipment control unit via a common internal serial data bus to form a multi-radio local network. Each transceiver incorporates a microprocessor controller that includes appropriate task management and serial bus interface software routines for operating and communicating with other devices on the bus. The control unit provides a user interface comprising conventional radio equipment front-panel controls. A "trunked" system transceiver is automatically selected whenever its measured audio quality exceeds a predetermined user-programmable minimum level.

Abstract: Herbicidal sulphonylguanidinoazines of the formula ##STR1## in which n represents the numbers 1 or 2,A represents nitrogen or a C-X group, where X represents hydrogen or halogen.