International Business Machines Corporation

Robert C Redburn

Andrew A Turner

William Vincent Huott

Mary Prilotski Kusko

Sridhar H Rangarajan

Jeffrey Scott Zimmerman

Ankit N Kagliwal

Nicholai L'Esperance

Adisun Wheelock

Methods, systems and computer program products for generating a functional logic cone signature for circuit analysis are provided. Aspects include for each of a plurality of portions of a circuit diagram of a circuit, tracing the respective portion of the circuit diagram to identify circuit components associated with the respective portion of the circuit diagram from a starting latch to one of one or more source latches. Circuit components include circuit elements and circuit connections. Aspects include generating an ASCII representation of the respective identified circuit components for each of the plurality of portions of the circuit diagram of the circuit. Aspects include generating a plurality of hash values by applying a hashing function to each ASCII representation. Each hash value corresponds to one of the plurality of portions of the circuit diagram. Aspects also include storing the hash values in a data structure.

Functional logic cone signature generation for circuit analysis

Aspects include a computer-implemented method for scan diagnostic logic circuit insertion in a circuit design topology. A method includes evaluating a scan chain of the circuit design topology, the scan chain comprising a plurality of scan latches and a plurality of physical structures, the evaluating including identifying the plurality of physical structures in the scan chain. The method also includes identifying one of the plurality of physical structures as a physical structure of interest, and responsive to the identification of the physical structure of interest, targeting the physical structure of interest, the targeting comprising inserting scan diagnostic logic at a location in the scan chain that is based on a location of the physical structure of interest in the scan chain.

Physically aware scan diagnostic logic and power saving circuit insertion

Disclosed herein is a method for failure signature detection in a semiconductor comprising generating defect signatures for failing latches from a plurality of integrated circuit chips; generating a latch to mask relationship for the failing latches; generating maximally descriptive masks into identities; generating a list of identities for comparison; determining commonalities between the lists of identities; and generating details about differences and commonalities within the defect signatures.

Method for enhanced semiconductor product diagnostic fail signature detection

According to an embodiment of the present invention, a computer-implemented method for inserting diagnostic circuit elements in a scan chain of a chip may include creating, via a processor, a segment for each latch of a plurality of latches in the scan chain to create a plurality of adjacent and connected segments, merging, via the processor, the two adjacent and connected segments to form a super-segment comprising all latches contained in the two adjacent and connected segments based on the objective function, and inserting, via the processor, a logic circuit element between the super-segment and a segment that is adjacent and connected to the super-segment in the scan chain, where the logic circuit element allows diagnostic isolation of the scan chain super-segment.

Physically aware insertion of diagnostic circuit elements

Information is typically obtained from a relational database using a query in structured query language (SQL). An extension to the SQL standard is described which permits plotting the results of a query. SQL keywords are provided for specifying a format for graphing selected data, and syntax for recognizing those keywords, thereby causing the data to be presented as a graph according to the specified format. This extension of SQL maintains the syntax and style of conventional SQL queries. This permits automated systems, such as database driven websites, to issue extended SQL queries directly to a relational database and have the results returned as formatted graphical content.

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Fishkill, NY, United States of America

Robert C Redburn