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Quality Policy
Vanguard is committed to becoming global customers' preferred choice for semiconductor manufacturing by providing services of the highest quality.

VIS employees are dedicated to achieving their daily objective of exceeding customer expectations by focusing on delivering exceptional services with continuous quality improvement.


Quality Philosophy
VIS has established the TQA (Total Quality Assurance) system. The TQA system structure is as below:


The TQA system includes four perspectives: DQA(Design Quality Assurance), VQA(Vendor Quality Assurance), MQA(Manufacturing Quality Assurance) and SQA(Service Quality Assurance).The key elements of each perspective is as below:

VIS Quality System-Four Dimension
Design Quality Assurance Vendor Quality Assurance
New Technology Development System
New Process Qualification System
Supplier Management System
Incoming Quality Control System
Material Handling and Storage System
Manufacturing Quality Assurance Service Quality Assurance
Process Control System
Process Quality Control System
Outgoing Quality Control System
Non-conforming Product Control System
Customer Complaint Handling System
Customer Return Handling System
Customer Satisfaction Survey
Customer Audit
Quality System
VIS's Quality and Reliability professionals work with our customers and our own process engineering teams to continuously address quality and reliability parameters. The following table shows how VIS incorporates quality into every facet of the company's operations to ensure customers' product quality.

Function Services
Supplier Quality
Supplier quality assistance
Material spec & characterization (including chemical analysis)
Incoming raw material quality control
Supplier evaluation & auditing
Supplier complaint handling & QIP (Quality Improvement Program)
Reliability Assurance
Process reliability qualification, monitoring, & corrective action plan follow up
Wafer level reliability methodology development & implementation
New technology/module qualification spec determination & methodology development
Customer product reliability risk assessment support
Worldwide customer reliability spec and related Q&A
In-Process Quality Engineering
Wafer level reliability monitoring
Environmental ESD prevention methodology development & implementation
Mask incoming quality control & monitoring
In process quality control, monitoring and defect analysis
Manufacturing and environmental control and monitoring
Clean room environment monitoring and audit
Engineering change and experiment review
Outgoing wafer quality improvement and monitoring
Corrective action request for customer issues
Failure Analysis (FA)
Process technology development & engineering enhancement support
In-process defect analysis support
FA technology / methodology development & implementation
Reliability support for parts failure analysis
Reliability methodology development support
Calibration Center
Calibration methodology and standards development
Measurement & Test equipment ( M&TE) calibration control and monitoring
Customer Satisfaction
Customer corrective action response
Customer satisfaction surveys
Service documentation
Quality System
Audit and development of Quality System
SPC maintenance and refinement
Customer audit coordination
Technical document control and distribution
Management of engineering change documentation procedures
Total Quality
Development and implementation of Quality Training Program
Continuous improvement team activity promotion
Promotion of employee involvement in total quality activity (e.g.
suggestion system, 5S, quality concept & skill publicity)
Quality System Certification

ISO 9001 Certification
VIS has been certified for ISO 9001 quality management system since 1996.
ISO/TS 16949 Certification
VIS has been certified for ISO/TS 16949 quality management system. (2004-2018)
IATF 16949 Certification
VIS has been certified for IATF 16949 quality management system since 2018.
QC 080000 Certification
VIS has been certified for QC 080000 Hazardous Substance Process Management system since 2007.
ISO 9001:2015 Certificate (FAB1)
Last Update Date: 05/28/2018
ISO 9001:2015 Certificate (FAB2)
Last Update Date: 05/28/2018
ISO 9001:2015 Certificate (FAB3)
Last Update Date: 05/08/2018
IATF 16949:2016 Certificate (FAB1)
Last Update Date: 05/28/2018
IATF 16949:2016 Certificate (FAB2)
Last Update Date: 05/28/2018
IATF 16949:2016 Certificate (FAB3)
Last Update Date: 06/01/2015
QC 080000:2017 Certificate
Last Update Date: 06/04/2019