Environment Control |
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Temperature and Relative Humidity are controlled by computerized Building Automation System
Temperature and Humidity
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Item |
Control Limit |
Shut-down Limit |
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- Temperature |
24 +/- 3 Deg C |
+/- 5 Deg C |
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- Relative Humidity |
48 +/- 8 % |
+/- 12 % |
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Control Procedure |
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· BAS monitors clean room temperature and relative humidity on a real time basis.
· BAS print out daily monitoring reports every half an hour, and they are kept for 3 years as defined in record retention procedure(12SQP00160A).
· BAS delivers alarms in case a monitored value is out-of-control limits. |
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· Particle Count
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Clean Room Class |
Control Limit |
Shutdown Limit |
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10 (0.3 micron) |
5 |
> 10 |
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10K (0.5 micron) |
5K |
> 10K |
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100K (0.5 micron) |
50K |
> 100K |
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Control Procedure |
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· QA monitors the clean rooms using portable particle counter on a monthly basis.
· If the measured value is out of control limit, “Inspection Report(I.R)” is issued to the manufacturing department for immediate corrective actions.
· If the measured number is out of shutdown limit, QA shutdown the line until verifying the Corrective action and Effectiveness by recheck. |
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All manufacturing areas are controlled for ESD as below. |
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· Environmental Control
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Frequency
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Item |
Control Limit |
MFG (All) |
QA (Sampling) |
· Humidity Control |
Relative Humidity |
48 +/- 8 % |
MFG (All) |
QA (Sampling) |
· Temperature Control |
Temperature |
24 +/- 3℃ |
On-time(30min) |
Monthly |
· Floor Measurement |
Surface to surface |
<1x109 Ohms |
- |
Monthly |
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Surface to Ground |
<1x109 Ohms |
- |
Monthly |
· Ionizer Control |
Decay Time(1000v → 100v) |
< 10 seconds |
Monthly |
Monthly |
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Balance (volt) |
< 35 volt |
Monthly |
Monthly |
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· Work stations
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Item |
Control Limit |
MFG (All) |
QA (Sampling) |
· Facility Ground |
Power outlet to Earth |
< 1 Ohm (+1ohm) |
- |
Monthly |
· Equipment Ground |
Green wire to Ground |
< 1Ohm (+1ohm) |
Bi-annually |
Monthly |
· Work table |
Table mat top to Ground |
<109 Ohms |
Quarterly |
Monthly |
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Table Surface Resistivity |
<109 Ohms |
Quarterly |
Monthly |
· Chair |
Surface to Ground/surface |
<109 Ohms |
Quarterly |
Monthly |
· Cart / Rack |
Surface to Ground |
<109 Ohms |
Quarterly |
Monthly |
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· Verifications |
· Perform ESD control Measurement Once/Month per “ESD audit check list” by QA.
· Process Control Audit Every Day for Disciplines
· If there is out of control, QA team issue CAR to take corrective action
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New Product/Process Introduction |
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Document Management |
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Document Approval and Distribution
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· Electronic Document Access through PC at Mfg
Line & Office.
· Hard Copy Distribution for only TCM Document
(PosiTrol Plan/Log, PM Check List, Set-Up Check
List and OCAP). Visual Aid
· To distribute document with hard copy, Doc.
Center put distribution” stamp in blue onthe first
page, and each page is stamped “controlled
copy”in red
· To remove all obsolete documents from the
points of use, Doc. Center receives previous
revision per distribution list when releasing new
revision.
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Measuring Equipment Calibration |
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Traceability of Standard
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Change Management |
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Piece Parts Qualification |
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Internal audit programs |
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1. Internal Quality Systems Audit ( per 12QSW00171A)
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· Frequency : Once a year as a minimum for all Manufacturing & Support functions
(Quaterly audit per yearly planning).
· Purpose : To ensure the Practice & Effectiveness of TS16949 Elements.
· Reporting : Issue Final Assessment Report within 5 days, and the Corrective
· actions are posted on Quality Web Site.
· Corrective Action Reporting : Within 10 days.
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2. Process Control Audit ( per 12SPW92171A)
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· Frequency : Daily Audit
· Purpose : To ensure Working Discipline and Spec Conformance in Assy/Test.
· Reporting : Issue Final Assessment Report within 5 days, and the Corrective.
· Reporting : Issue CAR immediately, and distribute Weekly Summary Report.
· Corrective Action Reporting : Within 7 days.
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3. Product Audit
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· Frequency : Every six month
· Purpose : To ensure the product Case Outline
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Supplier Quality Control |
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1. New Supplier & Part Qualification program
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- On site Audit for Quality System & Process Control per SMES Procedure (Min 80% score)
- Material Quality approval by internal CAB committee, and final approval by Customer.
- Cross Functional Team activity.
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2. Incoming Inspection
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- Sampling Plan : |
Visual : |
LTPD 1.5% (S/S 153) |
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Dimension : |
LTPD 20% (S/S 11) |
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Destructive : |
LTPD 50% (S/S 5) |
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3. Supplier Audit Program
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- Perform Audit for Major Supplier Once per Year, or when severe quality issue arises.
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4. Supplier Rating and Award
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- Rating : Quarterly (Criteria: Quality 30%, Cost 30%, Delivery 30%, Service 10%).
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- Best Supplier Award : ASE Group-wide on yearly basis.
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5. MRB and Corrective Action
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- Non-confirming Parts are physically segregated in N/G Warehouse until final disposition.
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- Material Review Board (MRB) make disposition for the Non-confirming material based on
the DMR issued by Incoming QA.
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- The Supplier is required to provide 8D Corrective Action Report in 10 days.
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Process Control Cycles |
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TCM provides all the basic control methodologies in the manufacturing line, and Manufacturing Line Personnel is fully authorized and empowered to shut down the process/equipment according to the Positrol Plans
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Positrol (Positive Control) Cycles
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Corrective Action Development |
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Statistical Process Control |
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The Statistical tools and Procedures are defined for effective monitoring of critical processes and equipment. Following are key elements of SPC control.
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· Critical parameters are identified by engineering
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ASEKR Criteria CPK ≥ 1.67 |
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· Computerized SPC control and Reporting system.
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- Alarm and E-mail notification to engineer for violation of Shewhart’s rule
- Provide alarm and trouble shooting information.
- Reporting for CPK, instability and upper/lower operating range with +/-3 sigma
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· Monthly Engineering review and Action
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- CPK and Instability
- Review control limits.
- Develop continuous improvement plan for CPK < 1.67
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Operator Certification Process |
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