Ⅰ. BASIC PHILOSOPHY FOR QUALITY
Ⅱ. QUALITY ASSURANCE SYSTEM
1. QUALITY ASSURANCE SYSTEM
1-1. QUALITY ASSURANCE SYSTEM FOR SEMICONDUCTOR DEVICES
1-2. QUALITY ASSURANCE SYSTEM CHART
2. QUALITY ASSURANCE AT DEVELOPMENT & MASS PRODUCTION STAGE
2-1. DEVELOPMENT PLAN
2-2. DESIGN REVIEW
2-3. PRE-PRODUCTION
2-4. MASS PRODUCTION
3. QUALITY ASSURANCE OF MATERIALS & PARTS
4. CONTROL AT MANUFACTURING PROCESS
4-1. EQUIPMENT CONTROL
4-2. ENVIRONMENT CONTROL
4-3. MEASURING INSTRUMENTS CONTROL
5. TRACEABILITY CONTROL
6. CORRECTIVE ACTION FOR ABNORMALITY AFTER SHIPMENTⅢ. COMMON MANAGEMENT
1. STANDARDIZATION AND DOCUMENT CONTROL
2. CERTIFICATION FOR ISO9001/IATF16949
3. COMMENDATION FROM CUSTOMERS© ISAHAYA ELECTRONICS CORPORATION

1Ⅰ. BASIC PHILOSOPHY FOR QUALITYQUALITY POLICYISAHAYA ELECTRONICS CORPORATION conforms to the company philosophy
which is based to challenge infinite possibilities, provides satisfactory
semiconductor products by customers and contribute to society based onquality priority.
We carry out the following quality assurance activities to realize the quality policy.
(a) We accurately grasp "Quality from which customer satisfaction is gained" and set optimumquality.
(b) We make products with high level of standard safety and reliability.
(c) We aim for "all good products".
(d) We continuously improve the effectiveness of the quality management system.

© ISAHAYA ELECTRONICS CORPORATION

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Ⅱ. QUALITY ASSURANCE SYSTEM
1. QUALITY ASSURANCE SYSTEM
1-1. QUALITY ASSURANCE SYSTEM FOR SEMICONDUCTOR DEVICES
FigureⅡ-1 shows our quality assurance systemthat covers the products life cycle fromdevelopment and design to mass production,shipping and field use. The product designbuilds the specifications and quality of theproduct.
For each device product type, a prototype isfabricated to verify the electrical characteristics
and reliability before mass production begins.
The process design builds the quality during
the production process.
It controls the equipment and manufacturingconditions, and maintains and improves
product finish. Factory Quality Assurance
Department carries on the quality control ofmaterials, parts, production process and theensure of quality and reliability in shipment toenhance the product quality and reliability.
Quality Assurance Department keeps thecooperation with each department and carries
on the reliability test and evaluation of thedeveloped products to develop to DesignDepartment.
© ISAHAYA ELECTRONICS CORPORATION

FigureⅡ-1. QUALITY ASSURANCE SYSTEM FOR SEMICONDUCTOR DEVICES

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1-2. QUALITY ASSURANCE SYSTEM CHART
We established the quality assurance system chart shown as Figure Ⅱ-2 with cooperation between internaldepartments.
For the prototype, reliability tests based on standard of JIS and JEITA etc. are implemented and electricalcharacteristics evaluation and qualification test are carried out.
After these tests are passed, Product and Process Design Departments make standards for materials/parts,processes and inspections etc. for transition to mass production.
For mass production, Manufacturing Department carries on from materials/parts acceptance to products
shipment, and manages processes/equipment.
In case of change for production, changed item is fed back to the process based on the change control
regulation.
Before products shipment, Quality Assurance Department monitors quality with the quality assurance test.
And Quality Assurance Department corresponds technical inquiry and investigation/report for the defectproduct for customer response.

© ISAHAYA ELECTRONICS CORPORATION

4STAGEMARKETISAHAYA ELECTRONICS CORPORATIONDESIGN/PRODUCTIONQUALITY
ENGINEERINGCONTROL
ASSURANCESALES

FACTORYPROCUREMENTPROCUREMENTENGINEERINGMANUFACTURINGQUALITY
MANAGEMENTQUALITY
ASSURANCEDEVELOPMENT & DESIGNMARKETRESEARCHDEVELOPMENT
PLANNING
DEVELOPMENT, DESIGN, DESIGN REVIEW(FEEDBACK)QUALIFICAATION OF MATERIALS & PARTS, AUDIT OF SUPPLIER FACTORY
PROTOTYPING & DESIGN VERIFICATIONPROTOTYPING & DESIGN VERIFICATIONESTABLISHMENT OFPRODUCTION STANDARDPRE-PRODUCTION
INITIAL FLOW MANAGEMENTTRANSITION TO MASS PRODUCTIONCUSTOMER

PRE-PRODUCTIONESTABLISHMENTOF PRODUCTIONSTANDARD

PRODUCTION PLAN
INSTRUCTION FORINPUTORDERPRODUCTION
PLANNING

INSTRUCTIONFOR
PRODUCTIONMASS PRODUCTIONPURCASE OF MATERIALS/PARTSACCEPTANCE OF
MATERIALS/PARTSACCEPTANCE OF
MATERIALS/PARTSASSEMBLYQUALITY
ASSURANCE TESTFINAL TESTIN-PROCESS QUALITY CONTROLQUALITY CONTROL INFORMATION, YEILD/QUALITY IMPROVEMENT, CORRECTIVE ACTION, CHANGE CONTROLSHIPPING CONTROLPACKING・SHIPPINGPACKING &SHIPPINGCUSTOMERINSTALLATIONSHIP
PING(FEEDBACK)(QUALITYCOMPLAINT,QUALITY
INFORMATION)(INVESTIGATION)(JAPAN DOMESTIC、DIRECT LOCAL DELIVERY)(RECEIPT)(FAILURE INVESTIGATION & ANALYSIS,CAUSE, COUNTERMEASURE, REPORTING)(APPROVAL,INFORMATION)(REPORTING)(INFORMATION)

INFORMATION FLOWPRODUCTS & MATERIALS/PARTS FLOW

FigureⅡ-2. QUALITY ASSURANCE SYSTEM CHART© ISAHAYA ELECTRONICS CORPORATION

52. QUALITY ASSURANCE AT DEVELOPMENT & MASS PRODUCTION STAGEWe show our quality assurance system from development to production to ensure the target quality andreliability.

2-1. DEVELOPMENT PLAN
Using the demand estimate based on market research, we plan development considering the required levelsof quality, functionality, reliability and production issues.
Then new theories, technology and ideas are adopted to design and development.
For this purpose, we have defined three development levels:
LevelⅠ : Developing products with new design rules, materials, and process technologies
LevelⅡ : Modifying the design to mass-produced products, or partially modifying processes, packages,materials, and equipment
LevelⅢ : Using the current processes and packages or those of similar or slightly modified quality levels© ISAHAYA ELECTRONICS CORPORATION

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2-2. DESIGN REVIEWWe review the design validation, a prototype is fabricated. Then the prototype undergoes a qualification test
that checks whether their electrical characteristics, maximum ratings, and reliability meet the quality target.
Design and Engineering Department and Quality Assurance Department carefully review the results ofqualification test. When they find any inconsistencies, they investigate the causes using failure analyses andimprove the prototype.
When the new device passes the qualification test, a pre-production meeting is held to check any problems
concerning design, production, or quality.
After all problems have been resolved, the device is ready for pre-production.

2-3. PRE-PRODUCTION
At the pre-production stage, initial period management is carried out to check the quality of manufactured
products. The initial period management refers to a special management system that applies for a certain
period after the production starts.
An increased quantity of information is collected during this period. Immediate corrective actions are thentaken for any failures detected and the results are checked. Also at this stage, we prepare standard forms formass production and train workers.
And we set up materials and parts supply system and provide equipment and tools required for production.
The new device is now ready to enter the mass production stage.

© ISAHAYA ELECTRONICS CORPORATION

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2-4. MASS PRODUCTION
The device is put into continuous production
based on the production plan.
Figure II-3 shows the quality assurance systemat mass production stage.
The in-process quality control consists ofworkmanships checking of product finish andmeasurement values of quality data.
At the final inspection, all products undergoelectrical characteristic testing and screening is
performed to detect defective products andreject marginal products.
Completed products that have passed the final
inspection are subjected to quality assurance
tests to check whether they meet the customer
requirements. The quality assurance test is
performed lot-by-lot test to judge whether a lot
should be accepted or rejected.
The test results are immediately fed back torelevant departments to maintain and improve
quality, and are also used to estimate thereliability in field use.

© ISAHAYA ELECTRONICS CORPORATIONMATERIALS/PARTSQUALITY CONTROLSACCEPTANCEINSPECTION
INSPECTIONREPORTQUALITYASSURANCEAGREEMENTPURCHASEDMATERIALS& PARTS

PRODUCTION QUALITY CONTROLDOCUMENTCONTROLENVIRONMENTALCONTROL

EQUIPMENT/MEASURING
INSTRUMENTS
CONTROL

LOT CONTROLSPCQUALITY/YIELDIMPROVEMENTASSEMBLYPROCESSFINALTESTCHANGE CONTROLQUALITYASSURANCETESTPRODUCTS QUALITY CONTROLQUALITY ASSURANCE TESTPERIODICAL TESTON GROUP CNON-DEFECTIVEPRODUCTANALYSISQUALITYDATANALYSIS

STORAGE/SHIPPING CONTROLSTORAGE

CUSTOMER

IN-PROCESS QUALITY CONTROLQUALITY & RELIABILITY IMPROVEMENTDATACOLLECTION

FAILUREANALYSIS

CORRECTIVEACTIONCUSTOMER SUPPORTRESPONSE FORCOMPLAINTQUALITY
MEETING

FigureⅡ-3. QUALITY ASSURANCE AT MASS PRODUCTION STAGE

83. QUALITY ASSURANCE OF MATERIALS & PARTSDEVELOPMENT PLAN OF NEW DEVICEISSUE OF PURCHASE
SPECIFICATIONS &DRAWINGS

Semiconductors are manufactured from assembly /packaging materials and parts (e.g. lead frames, goldwires, die bonding materials, packages, and mold resins).
Each material or part requires highest levels ofspecifications and quality.
When developing a new semiconductor device, wecompiles purchase specifications and drawings for eachmaterial and part, then purchase them from specialtysuppliers.
We are carrying out the following quality assurance
activities to maintain and improve the quality of materialsand parts.
Figure II-4 shows the relationship between these activities.

SELECTION OR DEVELOPMENT
OF MATERIALS/PARTSQUALIFICATION TEST &EVALUATION OF
MATERIALS/PARTS
AUDIT OF MATERIALS/PARTSSUPPLIERS’ FACTORIESCERTIFICATION OF
MATERIALS/PARTS
ORDERING OFMATERIALS/PARTSACCEPTANCEINSPECTION/NON-DEFECTIVE
MATRILAS/PARTS DELIVERYASSURANCE AGREEMENTPRODUCTION PROCESS /COLLECTION OF QUALITYDATA

CHANGE CONTROLABNORMALITYCONTROL &QUALITY
IMPROVEMENT

FigureⅡ-4. QUALITY ASSURANCE OF MATERIALS & PARTS



Careful selection of materials and parts, and joint development with specialty suppliers to meet purchase specifications
Quality control audit of suppliers' factories, and approval of suppliers and factories
Qualification test and evaluation of each material or part type
Acceptance inspection of materials and parts, or conclusion of a non-defective materials/parts delivery assurance
agreement with suppliers
Prevention of degradation causing by storage and handling of materials and parts
Collection of quality data for materials and parts, and control of abnormalities
Change control for materials and parts
Regular quality assurance surveys on materials and parts suppliers, and quality meetings with them

© ISAHAYA ELECTRONICS CORPORATION

94. CONTROL AT MANUFACTURING PROCESS
4-1. EQUIPMENT CONTROLThe semiconductor manufacturing is a production equipment intensive industry. That is equipment,measuring instruments, and other machinery must operate properly and accurately to maintain andimprove the performance and quality of semiconductor devices.
For each piece of equipment, maintenance standard is established according to the effects on performanceand quality. Then contents and frequencies of daily and routine inspections are defined based on the typesof equipment and control standards. These inspections detect malfunction, abnormalities, and change inprecision and provide the basis for a preventive maintenance system. Inspections and checks are carriedout in-house, by suppliers, or by inspection laboratories.

4-2. ENVIRONMENT CONTROLThe production environment has greats on the quality and reliability of semiconductor devices.
We select appropriate control items, methods, and criteria for factors such as temperature, humidity,and dust according to the fabrication process. The D.I. water, gases, and chemicals used on the production
line are constantly monitored to maintain purity, resistance and other quality levels.

© ISAHAYA ELECTRONICS CORPORATION

104-3. MEASURING INSTRUMENTS CONTROLThe precision control of measuring instruments involves acceptance inspections and regular inspections tocheck and correct precision, and prevent failure and degradation in precision.
These inspections also establish a preventive maintenance system.
FigureⅡ-5 shows the quality control chart of measuring instruments.

NATIONAL / PUBLIC LABORATORIESCORPORATION LABORATORIESPRIVATE LABORATORIES /MEASURING INSTRUMENT MANUFACTURER

CALIBRATION SERVICE PROVIDERS

ISAHAYA ELECTRONICS

FigureⅡ-5. QUALITY CONTROL CHART OF MEASURING INSTRUMENTS© ISAHAYA ELECTRONICS CORPORATION

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5. TRACEABILITY CONTROL
When a failure is found, we identify the product lot by the mark on the product, and we can confirm
immediately the lot trace of wafer, gold wire, lead frame and mold resin by the process control system.
We can also investigate input equipment, input date & time, input & output quantity, defect rate ofelectrical characteristics test by the same system.
* Trace from the mark on the product is for T150 products only. But, it is possible for general products totrace by the lot information on the reel label.

SUPPLIERS

ISAHAYA ELECTRONICSWAFER

ASSEMBLYTESTCUSTOMERSLOGISTICS

INFORMATION OFPROCESS RECORDSLOT INFORMATION OFMATERIALS / PARTSPRODUCTS

MOLD RESINCUSTOMER BTRAVELLERSTRAVELLERSATTACHED TOSHEETSHEETGOLD WIRELEAD FRAME

CUSTOMER A

INFORMATIONGATHERING OFTRAVELLERS SHEETINFORMATIONOF SHIPPINGPROCESS CONTROLSYSTEMSHIPPING CONTROLSYSTEM- LOT No. OFMATERIALS / PARTS- EQUIPMENT /DATE & TIME /INPUT & OUTPUT QTY
FOR MANUFACTURING- SHIPPING DESTINATION- SHIPPING DATE- SHIPPING QTY- PRODUCTS NAME：INFORMATION FLOW：PRODUCTS & MATERIALS/PARTS FLOWFigureⅡ-6. TRACEABILITY SYSTEM CHART© ISAHAYA ELECTRONICS CORPORATION

126. CORRECTIVE ACTION FOR ABNORMALITY AFTER SHIPMENT
When a failure is found at the acceptanceinspection, assembly, or field use by thecustomer, Quality Assurance Department
plays the major role in identifying the causeof failure and implementing corrective actions.
Based on the analysis request issued by Sales
department, Quality Assurance Department
investigates the failure and analyzes it using
various testing equipment.
Based on the analysis result, Design,
Engineering and other related departments
hold a meeting.
Then corrective action is taken as required,and a report is issued to the customer.
FigureⅡ-7 shows the complaint response &corrective action system chart.

FigureⅡ-7. COMPLAINT RESPONSE & CORRECTIVE ACTION SYSTEM CHART© ISAHAYA ELECTRONICS CORPORATION

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Ⅲ. COMMON MANAGEMENT
1. STANDARDIZATION AND DOCUMENT CONTROLThe essence of quality control is standardization.
We promote establishment of appropriate standards based on our standard systems.

【Company / Departments】
Rules for organization, personnel, management, and business are defined and applied.
【Internal standards】
Standards for products, design, materials, inspection, equipment control, maintenance, packing
specification, operation and drawings are defines.
They are centrally controlled.
【Internal design handbooks / manuals】
Design standard and procedure manuals are published to promote incorporation of quality at thedesign stage.
Standardization flowcharts are prepared to prevent errors resulting from carelessness.

© ISAHAYA ELECTRONICS CORPORATION

142. CERTIFICATION FOR ISO9001/IATF16949
ISAHAYA ELECTRONICS is ISO9001 certified, and also is IATF16949 certified for automotive devices.

StandardSite

Certified Date

ISO9001

ISAHAYA ELECTRONICS CORPORATION,Tsukuba Laboratory
Isahaya Laboratory
Osaka Marketing Division
ISAHAYA ELECTRONICS TECHNOLOGY (SHENZHEN) CO., LTD.

October, 1996

IATF16949

ISAHAYA ELECTRONICS CORPORATION
Isahaya Laboratory
Osaka Marketing Division
ISAHAYA ELECTRONICS TECHNOLOGY (SHENZHEN) CO., LTD.

November, 2019

© ISAHAYA ELECTRONICS CORPORATION

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3. AWARDS FROM CUSTOMERSWe have activities to improve quality for customer’s requisition.
And these were recognized and awarded by some customers.

Award YearAward Details

FY2018

Excellent Quality Control Award fromTOYOTA INDUSTRIES CORPORATION

FY2021QUALITY AWARD from SANDA WORKS,MITSUBISHI ELECTRIC CORPORATION© ISAHAYA ELECTRONICS CORPORATION

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Published by ISAHAYA ELECTRONICS CORPORATION
https://www.idc-com.co.jp/jp/© ISAHAYA ELECTRONICS CORPORATION

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