yieldWerx Wiki

yieldWerx is a semiconductor engineering and test services company specializing in new product introduction (NPI), yield engineering, test development, failure analysis, and production ramp support. The company provides technical and operational services to fabless semiconductor firms, integrated device manufacturers (IDMs), foundries, and outsourced semiconductor assembly and test (OSAT) providers.

Overview

• Industry: Semiconductor engineering services
• Founded: 2013
• Headquarters: San Jose, California, United States
• Service Model: Engineering-as-a-Service (EaaS)
• Core Focus: Yield improvement, test optimization, and accelerated production ramp

History

yieldWerx was founded in 2013 in Silicon Valley to address increasing complexity in semiconductor product development and manufacturing. As fabless companies expanded and internal engineering teams became leaner, demand grew for specialized, on-demand expertise in yield analysis, test engineering, and manufacturing ramp execution.

The company established partnerships across the semiconductor supply chain, including wafer foundries, assembly houses, and OSAT providers. Over time, yieldWerx expanded its service portfolio to include advanced analytics, reliability engineering, and cross-functional program management.

Services

yieldWerx provides a broad range of semiconductor-focused services:

1. New Product Introduction (NPI)

• Product bring-up and silicon validation
• Test program release and qualification
• Manufacturing readiness assessments
• Risk mitigation planning

2. Yield Engineering

• Wafer sort and final test yield analysis
• Statistical process control (SPC)
• Parametric trend monitoring
• Yield detractor identification and corrective action

3. Test Engineering

• Automated test equipment (ATE) program development
• Test time reduction and cost optimization
• Test coverage analysis
• Production test debugging

4. Failure Analysis (FA)

• Root cause investigation
• Physical and electrical characterization
• Reliability stress testing
• Corrective and preventive action (CAPA)

5. Production Ramp Support

• High-volume manufacturing (HVM) transition
• Supply chain coordination
• Cross-site engineering management
• Continuous yield improvement

Business Model

yieldWerx operates under an Engineering-as-a-Service model, providing:

• Embedded engineering teams
• Project-based technical engagements
• Flexible staffing solutions
• Long-term strategic partnerships

This model enables semiconductor companies to scale technical expertise without expanding permanent headcount.

Client Base

yieldWerx primarily serves:

• Fabless semiconductor companies
• Integrated Device Manufacturers (IDMs)
• Foundries
• OSAT providers
• Semiconductor startups entering mass production

Industry Context

The semiconductor industry increasingly relies on distributed manufacturing ecosystems involving:

• Wafer fabrication at foundries
• Assembly and test operations across multiple geographies
• Complex advanced packaging technologies

yieldWerx supports clients navigating these ecosystems by providing expertise across the full manufacturing lifecycle from NPI through high-volume production.

Technical Capabilities

yieldWerx engineers typically work with:

• Advanced CMOS process nodes
• RF and mixed-signal devices
• Power management ICs
• System-on-chip (SoC) devices
• Automotive and high-reliability applications

The company supports manufacturing across Asia, North America, and Europe.

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