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Traceability and Security across the Supply Chain

Dave Huntley, PDF Solutions Inc.

SEMI has been active in developing standards that promote traceability to the manufacturing processes within individual factories in the supply chain (internal traceability) and between nodes in the supply chain (external traceability). 

Specification for Substrate Mapping (SEMI E142)

The SEMI E142 standard provides a data model to describe any electronic assembly or asset from a wafer, to a strip, to a multi-die package, to tape and reel for distribution and to the PCB or final system assembly.  With this model it is possible to accurately record how a system is assembled from its component parts and to precisely associate process conditions, raw materials etc. used at a single device level. 

As such, E142 is a key enabler for internal traceability, but it is also useful for external traceability.  The detailed bill of materials for an asset shipped to the next step downstream in the supply chain can be linked to the assets received from upstream suppliers. 

Internal Traceability Model

Specification for External Device Traceability (Doc 6504)

SEMI started to define the standard summarized below to address security and counterfeit prevention by recording the chain of custody of assets as they flow through the supply chain.  However, it was decided to first build consensus among industry stakeholders and other standards bodies. 

Doc 6504 Diagrammed

Global Semiconductor Alliance Trusted IoT Ecosystem Security (GSA TIES) (https://www.gsaglobal.org/iot/ties/ )

GSA TIES is a “collaborative group of companies and liaison organizations including semiconductors, electronic devices, systems and software applications focusing on promoting secure and trusted chip-to-cloud solutions in the IoT value chain”. 

Domains and standards

Dave Huntley is chairman of the task forces at SEMI responsible for the SEMI T23, E142 and Doc 6504, and is providing the liaison between SEMI and GSA.  The goal of 6405 is to map the existing SEMI Standards to GSA TIES Use Cases and identify gaps that will require enhanced or additional standards.

Traceability based on Provenance of Asset

For more information on the efforts, contact Dave at dave.huntley@pdf.com.