International Business Machines Corporation

Globalfoundries Inc.

Globalfoundries U.S. Inc.

Novell, Inc.

Balaji Swaminathan

Ananth Sundaram

Alvin Jose Joseph

Michael Joseph Zierak

Anupam Dutta

Shyam Parthasarathy

Srikumar Konduru

Gururajan Raghavendran

Test structures for a body-contacted field effect transistor (BCFET) include: a single-pad structure with body contact and probe pad regions connected to a channel region at first and second connection points with a known separation distance between the connection points; and a multi-pad structure with a body contact region connected to a channel region at a first connection point and multiple probe pad regions connected to the channel region at second connection points that are separated from the first connection point by different separation distances. A method includes: determining separation distance-dependent internal body potentials at the second connection points in response to different bias conditions by using either multiple single-pad structures, each having a different separation distance between the connection points, or by using a multi-pad structure; and based on the separation distance-dependent internal body potentials, generating a model representing the BCFET with body-contacted and floating body devices.

Body-contacted field effect transistors configured for test and methods

Chip structures having wiring coupled with the device structures of a high frequency switch and methods for fabricating such chip structures. A transistor is formed that includes a first source/drain region, a second source/drain region, and a first gate electrode having a first width aligned in a first direction. A wiring level is formed that includes a wire coupled with the first source/drain region. The wire has a length aligned in a second direction that is different from the first direction.

Switch improvement using layout optimization

A variable capacitance semiconductor structure is disclosed. Embodiments include a capacitor having three plates, a top plate, a middle plate, and a bottom plate. The top plate serves as a positive plate. The middle and bottom plates serve as ground plates for the capacitor. A switching circuit selects between the middle plate and the bottom plate for use as the ground plate of the capacitor. The middle plate is slotted, allowing electric fields to penetrate through the middle plate to the bottom plate. The slots prevent the electric fields from terminating at the middle plate. A different capacitance value can be selected, depending on whether the middle plate or bottom plate is selected as the ground plate. Logic circuitry is configured to control the selection of plates to achieve a variety of capacitance values.

Variable capacitance integrated circuit

Apparatus, systems, and methods may operate to construct a file system tree that includes files to be accessed according to a plurality of custom access control list (ACL) access mechanisms registered by a corresponding plurality of applications, or a default ACL access mechanism. To access the files, metadata can be read/written using a multiple protocol file system cache engine and one of the ACL access mechanisms. In some embodiments, operations may include registering, in response to a request by an application, a selected one of the plurality of custom ACL access mechanisms with a library coupled to a multiple protocol file system cache engine. Further operations may include accessing a file system through the multiple protocol file system cache engine using the selected one of the plurality of custom ACL access mechanisms, or a default ACL access mechanism. Additional apparatus, systems, and methods are disclosed.

Unified file access across multiple protocols

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Bengaluru, India

Balaji Swaminathan