Motorola Corporation

Lawrence J Day

Stephen T Flannagan

Edward C Dasse

Barry A Simon

Michael L Bottom

Donald R Kost

A snorkel assembly includes a mouthpiece and a tube secured thereto. The tube extends between a mouthpiece end and a distal end. A purge valve is disposed adjacent the mouthpiece and the mouthpiece end of the tube. The purge valve allows water and gas to exit the snorkel assembly while preventing water and gas from entering therethrough. The snorkel assembly also includes a check valve secured to the distal end. The check valve allows water and gas to enter the snorkel assembly while preventing water and gas from exiting therethrough.

Snorkel assembly

Swimmer's training buoy

Wafer level testing of a wafer (500) is accomplished by dividing the integrated circuits of the wafer into a plurality of segmented bus regions (514, 516, and 518 for example). Each bus region is formed having its own set of test conductors (520-530) wherein each set of test conductors are isolated from all other sets of test conductors on the wafer. Each test conductor has at least one contact pad (531-546) where each contact pad lies within a periphery of the integrated circuits' active areas. By forming pads over ICs and by sub-dividing the bus structure of test conductive lines, more high powered ICs can be tested in a wafer-level manner with fewer problems associated with speed, power, throughput, and routing problems. In addition, all contact pads are formed within the periphery of the ICs but no contact pads are formed over active circuitry so that yield is improved.

Apparatus for performing wafer-level testing of integrated circuits

An integrated circuit has an identifying circuit coupled to an input. The input has ESD protection. The identifying circuit has a fuse which is in one of two possible states to provide the identifying information. A power on reset circuit provides a pulse in response to application of power to the integrated circuit. A current path between a power supply terminal and the input is provided in response to the power on reset pulse when the fuse is in one state. This current path is blocked when the fuse is in the other state. A user is thus provided with identifying information by the presence or absence of a current path at the input at the time when power is applied.

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Grand Blanc, MI, United States of America

Lawrence J Day