International Business Machines Corporation

Richard C Johnson

Lawrence Alfred Clevenger

Fee Li Lie

Yongan Xu

Spyridon Skordas

Scott David Halle

Hao Tang

Alex Richard Hubbard

Cody John Murray

Nikhil Jain

Vinay Pai

Effendi Leobandung

Daniel A Corliss

Robin Hsin Kuo Chao

Christopher Frederick Robinson

Chumeng Zheng

In an approach, a processor receives device identification information corresponding to at least one device local to a location of a transaction. A processor receives notification of an infected user. A processor determines that the infected user is associated with the transaction. A processor identifies a second user from the device identification information. A processor sends a notification to the second user.

Contact tracing utilizing device signatures captured during transactions

Embodiments are disclosed for a method. The method includes generating a correction datastore indicating shifts in magnitude representing corresponding characters that uniquely identify hardware comprising a computer processing chip. The method further includes generating security masks based on a correction file. Additionally, the method includes using a correction process for the computer processing chip. The generated security masks include corresponding overlays representing the shifts in magnitude with respect to corresponding product masks for the computer processing chip. The method also includes generating the computer processing chip using the security masks and the product masks.

Secure identification of wafer and chip

Embodiments of the invention include methods and structures for controlling developer critical dimension (DCD) variations across a wafer surface. Aspects of the invention include an apparatus having developer tubing and an internal cam. The internal cam is coupled to a fixed axis. A flexible divider is positioned between the developer tubing and the internal cam. The flexible divider is coupled to the internal cam such that rotation of the internal cam about the fixed axis is operable to change an inner diameter of the developer tubing.

Developer critical dimension control with pulse development

Techniques for secure and tamper-resistant wafer identification using a unique wafer fingerprint are provided. In one aspect, a method for wafer authentication includes: placing, at each level of fabrication of chips on the wafer, reference structures across the chips; inspecting the wafer at each level of the fabrication; and performing at least one of overlay and scatterometry measurements of the reference structures to use as a unique fingerprint for authenticating the wafer that has been inspected. A method for authentication throughout a process flow for fabrication of chips on a wafer is also provided, as is a wafer having chips and reference structures placed across the chips at each level of the chips to provide a unique fingerprint for authenticating the wafer.

Secure wafer inspection and identification

Devices and methods for granting requests for authorization using data of devices associated with requestors are disclosed. A method includes: receiving, by a computing device, a request for authorization; receiving, by the computing device, identification information for at least one device of a requestor; determining, by the computing device, a risk score using the received identification information for the at least one device of the requestor; and in response to the risk score exceeding a predetermined threshold, the computing device granting the request for authorization.

Granting requests for authorization using data of devices associated with requestors

Communication source identifier verification system mechanisms are provided. The mechanisms receive communication information for a communication initiated between a source communication system and a destination communication system. The communication information comprises a source identifier and a local device identifier signature specifying zero or more local device identifiers of devices local to the source communication system. The mechanisms retrieve valid device identifier information for an authorized communication source corresponding to the identifier of the source communication system. The mechanisms execute a verification operation that verifies whether the source identifier is validly associated with the source communication system based on the retrieved valid device identifier information and the local device identifier signature. The mechanisms send a verification notification along with the communication information, in response to results of executing the verification operation, to the destination communication system.

Caller identity verification based on unique multi-device signatures

Systems, methods and computer program products generally include a vector by vector subtraction method per wafer. A first layer is exposed to form a pattern image on a wafer and the overlay data of alignment registration marks at multiple locations relative to alignment registration marks of a baseline reference are measured. The first layer is then reworked and exposed to form the same pattern image and the overlay data of alignment registration marks at multiple locations relative to alignment registration marks of a first layer are measured. The overlay data of the reworked first layer is subtracted from the overlay data of the first layer to provide an overlay difference at each of the multiple locations. The overlay difference is converted to a pre-correction factor of a magnitude opposite that of the overlay difference and is applied to exposure of a second layer provided on the first layer.

Baseline overlay control with residual noise reduction

A processor may initiate a first verification event. The processor may identify two or more devices that are within a predetermined area of the processor during the initiating of the first verification event. The processor may verify an identity of a verified user based on the two or more devices. The processor may process the first verification event in response to verifying the identity of the verified user.

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Selkirk, NY, United States of America

Richard C Johnson