MESSAGE FROM THE CHAIRMAN OF THE CORPORATE SOCIAL RESPONSIBILITY COMMITTEE

SUSTAINABILITY PERFORMANCE OF WIN

AWARDS, RECOGNITION AND RATINGS

SUSTAINABLE GOVERNANCE

GREEN MANUFACTURING

SUSTAINABLE PRODUCTS AND CUSTOMER MANAGEMENT

INCLUSIVE WORKPLACE AND SOCIAL WELFARE

APPENDIX

3.3 Product Accountability To meet international green procurement trends and customer demand, WIN fulfills product responsibilities, establishes comprehensive management systems, and discloses information on the official website for reference by customers. We provide customers and consumers with products that conform to international green environmental protection regulations.

Since the EU implemented the Restriction of Hazardous Substances Directive (RoHS), WIN has required its products to meet the EU's regulations and other related hazardous substance free regulations to meet the expectations of customers and stakeholders. WIN therefore began actively checking the ingredients of raw materials and establishing hazardous substance free management procedures.

Product Hazardous Substance Management

(I) Checklist of Hazardous SubstancesTo protect the environment and people's safety and health, WIN prohibits or restricts the purpose of use and quantity of hazardous substances in its products and raw materials, based on international directives and customer requirements. Additionally, it has formulated a hazardous substance checklist for compliance by its suppliers and employees. WIN's checklist is composed of two major categories:

• List of Substances Prohibited or Restricted in Products• List of substances in a product for which customers have been informed

(II) New Material/New Supplier VerificationWIN specifies in purchase contracts and order forms that new material suppliers must comply with WIN's supplier management procedures, and that the provided materials may not contain hazardous substances as defined by WIN. Furthermore, suppliers must regularly provide product testing reports and undertake annual supplier assessments as requested by WIN. Regarding new materials, the Technology R&D Department must abide by WIN's hazardous substance free management procedures when determining product specifications and selecting materials to ensure that new materials are hazardous substance free.

Product Safety and Hazardous Substance Management

(III) Existing Supplier EvaluationWIN requests all of its suppliers to provide declaration for not use of hazardous substances or third-party testing reports as part of the basis of evaluations so as to ensure that the raw materials which WIN uses are free of hazardous substances.

(IV) Third-party Testing of Hazardous Substances in ProductsTo satisfy customers and other stakeholders' demands for HSF products, WIN products are subject to third-party test at least once every year to ensure that all of its products are in line with international green environmental standards. Inspections items include product HSF inspections based on REACH, RoHS, PFOS & PFOA, and halogen-free regulations to ensure that all product meet international green environmental protection regulations. Since the commencement of product inspections, all WIN products have been verified as 100% conforming to related HSF regulations. WIN products have never caused harm to people's physical health or environmental contamination in 2020.

Information Disclosure Regarding Hazardous Substance Free by WINA Hazardous Substance Free (HSF) section was set up in the E-Service section on WIN's official website, providing the following information pertaining to hazardous substance free and conflicting minerals for customer access:

• Declaration for Hazardous Substance Free

• Declaration of Metal Conflict-Free

• Conflict Minerals Reporting Template

• Third-Party Product Testing Report for the Year

PFOS&

PFOAREACHRoHS

DirectiveHalogen-Free Regulations

CompleteCompliance

CompleteCompliance

CompleteCompliance

CompleteCompliance

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MESSAGE FROM THE CHAIRMAN OF THE CORPORATE SOCIAL RESPONSIBILITY COMMITTEE

SUSTAINABILITY PERFORMANCE OF WIN

AWARDS, RECOGNITION AND RATINGS

SUSTAINABLE GOVERNANCE

GREEN MANUFACTURING

SUSTAINABLE PRODUCTS AND CUSTOMER MANAGEMENT

INCLUSIVE WORKPLACE AND SOCIAL WELFARE

APPENDIX

Management of Conflict Minerals

WIN complies with the "Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas" published by the Organization for Economic Co-operation and Development (OECD) for the establishment of management mechanisms for conflict minerals, and commit not to use conflict minerals from areas affected by conflicts or high-risk mines. The Company requires all suppliers of the 3TG (gold (Au), tantalum (Ta), tin (Sn), and tungsten (W)) to use the "Responsible Minerals Assurance Process" (RMAP) to ensure that conflict minerals WIN purchased were legally mined.

All WIN's 3TG suppliers have adopted the latest version of the Conflict Minerals Reporting Template (CMRT) announced by RMAP for 3TG minerals supplied to WIN to disclose the origins of their minerals and to provide a list of smelters and miners they work with and involved in the processing of these 3TG minerals, so as to ensure that these smelters and miners are internationally recognized as non-conflict smelters and miners. This list is updated periodically. If a supplier cannot meet and implement requirements in the conflict mineral management mechanisms of WIN and provide correct information, the supplier cannot be a qualified supplier for WIN. The Company employs supply chain investigations to ensure that suppliers remain 100% compliant to WIN's management requirements for zero conflict minerals, implement green procurement, and do not use conflict minerals. In addition, WIN does not use any cobalt, so it does not need to conduct any investigations using the CRT (Cobalt Reporting Template).

Declaration of Metal Conflict-Free

WIN Semiconductors Corp. hereby declares the metal Conflict-Free on products supplied to customers.

WIN Semiconductors Corp. establishes Conflict Minerals management procedure consistent with the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, and take exercise due diligence within our supply chain to assure the metals of gold(Au), tantalum(Ta), tungsten(W), tin(Sn) and cobalt(Co) are not derived from or sourced from smelter/refiner in conflict-affected and high-risk areas, or illegally taxed on trade routes, either of which are controlled by non-governmental military groups, or unlawful military factions. Our material declaration process would enable us to better understand the applications of many different types of metals, including metals associated with the conflict-affected.

If WIN Semiconductors Corp. identifies any metal sold to us come from Conflict Area, to comply with Metal Conflict-Free policy we will work with our metal suppliers to improve it as soon as possible.

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MESSAGE FROM THE CHAIRMAN OF THE CORPORATE SOCIAL RESPONSIBILITY COMMITTEE

SUSTAINABILITY PERFORMANCE OF WIN

AWARDS, RECOGNITION AND RATINGS

SUSTAINABLE GOVERNANCE

GREEN MANUFACTURING

SUSTAINABLE PRODUCTS AND CUSTOMER MANAGEMENT

INCLUSIVE WORKPLACE AND SOCIAL WELFARE

APPENDIX

3.4 Customer Service Protect Customer Privacy

Customer satisfaction is one of WIN's core values. As a foundry service provider, WIN shall remain committed to protecting customer privacy and confidential information.OEM service providers must qualify rigorous and laborious customer verification procedures to obtain purchase orders from customers. As technology advances, companies' important confidential information may be stolen by malicious individuals and leaks of confidential information may cause the loss of purchase orders and business reputation and affect the Company's operations and development. WIN has always placed great emphasis on protecting customer privacy and we have therefore won the continuous trust of customers and provide services to more customers.WIN pays close attention to customer demands for information security and we have passed all information security audits implemented by customers each year. We have maintained relationships of trust with customers but we seek to do more. We shall continue to strengthen information security and exceed customer expectations.￭ Management Policy：The Company started with the management policy and we established

confidential information management policies to carefully provide definitions of confidential information and related operating procedures. We also defined multiple information operation procedures to ensure correct and secure information processing to provide customers' confidential information, including the customers' contracts, purchase orders, and technologies, with the highest level of protection.￭ Risk Identification：In response to a continuous stream of information security incidents in recent years,

we continue to identify information security threats and vulnerabilities to verify and continue to enhance existing defensive measures.￭ Personnel Management：The Company continues to strengthen employees' awareness of information

security and require new employees to receive training and sign employee commitment statements. For current employees, we increase their awareness of important information security information and adopt diverse channels including WIN's internal website, promotional posters, and training videos.￭ System Security：To protect the confidentiality and integrity of customer information, we continue to

strengthen system and data security including the establishment of a comprehensive gateway control equipment, anti-virus system, network access control system, system weakness enhancements, and file encryption systems and mechanisms. We also implement rigorous access control and management for customer data and files.￭ Audit and Prevention：WIN continues to implement scans on the website and servers each year based

on the Company's internal audit procedures to strengthen data security for customers and prevent theft by malicious external entities. We also rectify weaknesses based on the assessment report to complete consistent protection from inside to outside.

There has been no case of leaks of customer privacy in WIN. The Company shall continue to strengthen information protection software and hardware facilities, protect customer privacy, and ensure zero leakage of customer information.

WIN's Services

Design Support Services

WIN is committed to shorten the turnaround time for our customers by developing accurate device models and variety of PDK's in cooperation with EDA vendors to provide complete design service, enhanced user-friendly design platform, and accurate circuit simulation. In addition, WIN streamlines the process flow for more efficient layout sign-off and mask tape-out service.

Foundry Services

Since 2007, WIN Semiconductors Corp. is the largest 6 inch (150 mm) GaAs pure play foundry in the world. WIN has three advanced fabs with a broad range of technology providing the best quality of HBT, pHEMT, BiHEMT, GaN foundry services for MMIC application. Since 2006, WIN has operated a 4 shift 24/7 non-stop foundry service. In addition to advanced semiconductor fabrication technology, WIN also provides layout support and automated DC/RF on-wafer testing. WIN is committed to fast turnaround time, cost-effective turn-key solutions and total quality control for our valuable customers.

Testing Services

In-house wafer testing service is available from WIN for both HBT and HEMT products. The service provides standard WAT database for all customers, and offers PCM database for SPC analysis in parallel. The real time yield report generated by CIM system automatically judges if processed wafer has met shipping criteria. WIN also provides probe card making service and offers on-wafer DC/RF screening depending on specific request. The proprietary design of our probe card offers the best quality to meet customers' requirements.

High Frequency Packaging and Final Test

From foundry to assembly and final test to shorten product manufactured cycle time & supply chain management.

Clip Characterization Package Assembly Final Test Packing & Shipment

67

MESSAGE FROM THE CHAIRMAN OF THE CORPORATE SOCIAL RESPONSIBILITY COMMITTEE

SUSTAINABILITY PERFORMANCE OF WIN

AWARDS, RECOGNITION AND RATINGS

SUSTAINABLE GOVERNANCE

GREEN MANUFACTURING

SUSTAINABLE PRODUCTS AND CUSTOMER MANAGEMENT

INCLUSIVE WORKPLACE AND SOCIAL WELFARE

APPENDIX

WIN is dedicated to manufacturing innovation and technology development. In the spirit of excellence, we provide customers with high-quality products to achieve customer satisfaction. There have been no product recalls in the past five years.WIN has always attached high importance to customer satisfaction. The opinions they express are the driving force for our efforts towards continuous improvements. WIN also adopts directions and measures derived from customer satisfaction surveys into standard operating procedures (customer satisfaction survey management procedures). We continuously research and develop our own technologies according to customer and market demands. Monthly or quarterly interviews with customers either in person or through video conferencing are conducted to adjust our internal practices, in order to improve work processes and enhance yield rates. In addition, customer satisfaction questionnaires are distributed at the beginning of every year for comprehensive inspection of improvement goals to ensure that performance is in line with customer needs.In 2020, WIN conducted a survey on satisfaction of the top 20 customers that it served in the previous year. A marketing center distributed questionnaire to the customers, and the completed questionnaires were retrieved and submitted to the quality control department for analysis and survey, as illustrated in Figure 3-10.Customers were asked to rate their satisfaction with WIN's services, technologies, quality, delivery time, and circuit design support, with scores of 1 to 5 representing unacceptable to very satisfied. Please see Table 3-3. For items with a score of “2” or “1,” the quality assurance department will take responsibility to confirm cases of customer dissatisfaction and their causes so that improvement or proper measures can be taken to rectify any problems going forward. WIN's items with lower scores

Customer Satisfaction

Figure 3-10: Customer satisfaction survey statistics in four years

Table 3-3: Customer satisfaction questionnaire survey items

Survey Items 2017 2018 2019 2020

Services(7%)

Sales Support 4.0 4.2 4.4 4.5Technical Support 4.1 4.3 4.3 4.5Logistics Support 4.3 4.3 4.4 4.4Price 2.6 2.5 3.2 34

Technology(6%)

Performance / Competitiveness 4.0 4.5 4.4 4.1

Roadmap 4.1 4.2 4.3 3.9

Quality(45%)

Yield 3.8 3.6 3.6 3.8Reliability 3.9 4.1 3.7 4.1Quality System 4.0 3.8 4.0 3.5

Customer Complaint New Item

New Item 3.8 4.2

HSF System 4.2 4.5 4.1 4.2

Delivery(35%)

Acknowledge PO Time New Item

New Item 4.1 4.2

Update Delivery Ahead of Time

New Item

New Item 4.0 4.0

On Time Delivery 4.2 3.8 4.0 3.9Lead Time 3.6 3.2 3.6 3.3

DesignService(7%)

Layout Sign-off Service 4.3 4.2 4.4 4.4Device Model 4.3 3.8 3.7 4.0PDK(ADS/MWO/Cadence) 4.1 4.2 3.5 4.0Measurement Support 3.8 4.3 3.9 3.9

Design Kit Content & Completeness 4.2 4.0 3.9 4.1

Average 3.9 3.9 3.9 3.9Score 78.7 77.9 78.9 79.0

Score Target≧75 Retrieve Rate2020

80.0%

60.0%

40.0%

20.0%

0.0%

90.0

80.0

70.0

60.0

70.0%

79.0

2017 2018 2019

65.0% 65.0% 65.0%

78.777.9

78.9

were related to price. We will continue to improve our process and cost structure to increase customer acceptance of our prices. The second category of items was related to lead time. WIN continues to communicate with customers on their future demand and order issuance methods to help WIN make plans for production capacity and raw materials, shorten the days from customers' orders to shipping, and meet customer demands.

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