Semiconductor Procurement Glossary
Understand the terminology that drives electronic component sourcing decisions. From allocation to x-ray inspection — the essential vocabulary for procurement and supply chain professionals.
Procurement & Sourcing
Allocation
A manufacturer-controlled distribution model where components are rationed to customers based on historical volume, strategic importance, or contracted agreements. Common during shortages for FPGAs, MCUs, and analog ICs.
MCU Lead-Time Outlook Q3 2026: What Buyers Can VerifyBOM (Bill of Materials)
A comprehensive list of all components, parts, and raw materials required to manufacture a product. In semiconductor procurement, BOM analysis identifies supply risks, EOL components, and single-source dependencies.
BOM Sourcing Service: What Buyers Should Send and What the Award Package Must ReturnLast Time Buy (LTB)
The final opportunity to purchase a discontinued component directly from the manufacturer. After the LTB date, the part enters aftermarket distribution only. Strategic LTB planning is critical for long-lifecycle products.
How Are 470,000+ Annual EOL Parts Reshaping Semiconductor Procurement in 2026?Lead Time
The elapsed time between placing a purchase order and receiving the components. Standard semiconductor lead times range from 8-16 weeks; during shortages, some FPGAs and MCUs can extend to 52+ weeks.
MCU Lead-Time Outlook Q3 2026: What Buyers Can VerifyPCN (Product Change Notification)
A manufacturer-issued notice of changes to component specifications, materials, packaging, or manufacturing location. PCNs can affect form/fit/function and require engineering review.
Building a Resilient Electronics Supply Chain: How to Create a BOM Risk Assessment Framework That Actually Prevents ShortagesPPAP (Production Part Approval Process)
An automotive industry standard (part of IATF 16949) for qualifying new or changed parts before production. Changing semiconductor suppliers for automotive applications often requires full PPAP re-submission.
The 2026 Supplier Qualification Framework: How to Vet, Audit, and Build Trust with Independent Electronic Component DistributorsRFQ (Request for Quote)
A procurement document submitted to suppliers requesting pricing, availability, and delivery terms for specific components. RFQ-based models (like SupplyICs) allow customized pricing based on volume, delivery urgency, and market conditions.
BOM Sourcing Service: What Buyers Should Send and What the Award Package Must ReturnSingle-Source Component
A part available from only one manufacturer with no pin-compatible alternatives. Single-source components represent the highest supply chain risk and require strategic buffer stock planning.
Building a Resilient Electronics Supply Chain: How to Create a BOM Risk Assessment Framework That Actually Prevents ShortagesComponent Lifecycle
Active (Lifecycle Status)
A manufacturer lifecycle designation indicating a part remains in production. Check the exact ordering code and the manufacturer’s current definition; this designation does not guarantee stock or a particular lead time.
The Procurement Professional's Guide to EOL and Obsolete Component Sourcing in 2026Date Code
A manufacturer marking indicating the production date of a semiconductor component. Format varies (YYWW, YYMM, etc.). Date code verification is a critical authenticity check — mismatched or implausible date codes signal counterfeits.
Date Code Verification and Component Traceability: Advanced Anti-Counterfeit Protocols for Electronics Procurement in 2026EOL (End of Life)
A manufacturer-issued notice that a component will be discontinued. EOL triggers a Last Time Buy window (typically 6-12 months), after which the part is no longer produced and only available through independent distribution.
The Procurement Professional's Guide to EOL and Obsolete Component Sourcing in 2026NRND (Not Recommended for New Design)
A manufacturer status indicating a component is still in production but not recommended for new designs. NRND is a precursor to EOL. Designers should plan migration paths when components enter NRND status.
The Procurement Professional's Guide to EOL and Obsolete Component Sourcing in 2026OCM (Original Component Manufacturer)
The company that designed and manufactured the original semiconductor component. Distinct from authorized distributors and independent brokers. Traceability to OCM is a key authenticity indicator.
The 2026 Supplier Qualification Framework: How to Vet, Audit, and Build Trust with Independent Electronic Component DistributorsQuality & Testing
AS6081
SAE Aerospace Standard for counterfeit electronic parts avoidance. Specifies inspection, testing, and authentication procedures for independent distribution. Widely adopted beyond aerospace as the benchmark for counterfeit prevention.
How Does AS6081 Certification Actually Protect Your Supply Chain from Counterfeit Components?Co-Planarity
The condition where all leads or balls of a surface-mount package lie in the same plane. Critical for QFP and BGA soldering reliability. Inspected via automated 3D optical measurement before shipment.
Counterfeit Electronic Components in 2026: What Must Every Buyer Verify Before Signing a Purchase Order?Decapsulation
Chemical or mechanical removal of a semiconductor package to expose the internal die for microscopic inspection. Used in authenticity verification to compare die markings against manufacturer reference images.
Counterfeit Electronic Component Detection 2026: AS6081, IDEA-STD-1010 & MIL-STD-883 GuideESD (Electrostatic Discharge)
The sudden flow of electricity between two objects caused by contact or dielectric breakdown. Semiconductor components are extremely ESD-sensitive. Handling must follow ANSI/ESD S20.20 protocols with grounded workstations.
What Are the Real Risks of Bare Die Shipping and How Can Procurement Teams Manage ESD Protection in 2026?JEDEC
Joint Electron Device Engineering Council — the semiconductor industry standards body. Publishes widely-adopted standards including J-STD-033 (moisture sensitivity) and J-STD-020 (reflow soldering).
Moisture Sensitivity Levels: Floor Life and Receiving Checks for ICsMSL (Moisture Sensitivity Level)
A JEDEC classification (Level 1-6) indicating a component's susceptibility to moisture-induced damage during reflow soldering. Higher levels require baking and dry-pack storage. MSL violations cause "popcorning" — internal package delamination.
Moisture Sensitivity Levels: Floor Life and Receiving Checks for ICsRoHS (Restriction of Hazardous Substances)
EU directive restricting the use of lead, mercury, cadmium, and other hazardous substances in electronic equipment. Compliance verification is mandatory for components shipped to EU markets.
RoHS Exemptions in 2026: What Component Buyers Must VerifyX-Ray Inspection
Non-destructive imaging using X-rays to examine internal component structures: bond wires, die attach, lead frame, and internal voids. An essential counterfeit detection technique for high-value or high-risk components.
Counterfeit Electronic Component Detection 2026: AS6081, IDEA-STD-1010 & MIL-STD-883 GuideComponents & Technology
Fab (Fabrication Plant)
A semiconductor manufacturing facility where silicon wafers are processed into integrated circuits. Advanced-node fabs (7nm and below) cost $15-25 billion. Mature-node fabs (28nm-65nm) average $3-6 billion.
2026 Semiconductor Fab Construction and Equipment Lead Times: Impact on Global SupplyFPGA (Field-Programmable Gate Array)
Reconfigurable integrated circuits that can be programmed after manufacturing. Key manufacturers include Xilinx (AMD) and Altera (Intel). FPGAs frequently face allocation due to limited manufacturing capacity.
Xilinx FPGA Components Sourcing 2026: Top Strategies for Spartan, Artix, Kintex, VirtexMCU (Microcontroller Unit)
A compact integrated circuit containing a processor, memory, and programmable peripherals on a single chip. Widely used in automotive, industrial, and consumer electronics. Key manufacturers include NXP, Infineon, ST, Microchip, TI, and Renesas.
Can You Use Consumer-Grade IoT Chips in Industrial Automation? What Procurement Teams Must Verify Before Making That ChoiceTape & Reel
A packaging format where components are loaded into embossed carrier tape and wound onto reels. Standard for automated pick-and-place assembly. Alternatives include tray and tube packaging.
Moisture Sensitivity Levels: Floor Life and Receiving Checks for ICsReady to Apply This Knowledge?
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