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International Business Machines Corporation

Philip S Phoenix

David P Vallett

Richard James Evans

A fixture for holding a semiconductor die against an abrasive media for the purpose of thinning the die is described. The fixture provides means for aligning the back of the die to a reference plane that is coplanar with the plane of the abrasive and is in contact with the abrasive media during the thinning process.

Die thinning apparatus

A wireless system is provided for switching the pickups of a guitar. The system may work in conjunction with MIDI devices such as effects processors. The system includes a transmitter and a receiver. The transmitter receives input from the MIDI device via a DIN connector and generates a control signal which corresponds to a preselected combination of pickups which have been programmed and stored in memory. A second DIN connector is provided to function as a pass-thru. The pickup combinations stored in memory are associated with a program from the MIDI device. A display is provided to indicate to the musician which program is in current use. The receiver is positioned within the cavity of the guitar and includes a plurality of relays coupled to the pickups of the guitar. Based on the control signal received, the relays are activated in order to provide the selected pickup combination. A display, coupled to the receiver, is disposed on the surface of the guitar in order to inform the musician of the discrete state of each pickup. The system is also capable of providing dual humbucker pickup combinations.

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South Burlington, VT, United States of America

Philip S Phoenix