Quality Control and Assurance System

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  1. QUALITY CONTROL

1),In process control

    1. On line QC (clean, printing, chip position)

    2. After wire bonding 100% test and inspection .(electrical, optical )

    3. Final test and inspection (100% QC , Mechanical, electrical ,optical. )

    4. Functional test of LSI , LCD , contrast , etc.

2), Out Going quality control

    1. functional test . (electrical , AC , DC , terminal , mechanical )

    2. LCM QC test. (contrast characters , display , etc. )

    3. Sampling QC according to AQL Standard. (value=0.65% )

3), Inspection for bought material , component , device

    1. Bought devices of inspection (Transistors , diodes , LSI s )

    2. Inspection for bought Components (resistors , capacitors , connectors .)

    3. Other material (PCB , Zebra,…)

2. QUALITY ASSURANCE FLOW CHART

 

3. ACCEPTABLE QUALITY LEVEL

Inspection items

Sampling procedures

AQL

Visual-operating

(Electro-optical)

MIL-STD-105D

Inspection level Ⅰ

Normal inspection

Single sample inspection

1.5

Visual-not operating

MIL-STD-105D

Inspection level Ⅰ

Normal inspection

Single sample inspection

1.5

Dimension measurement

MIL-STD-105D

Inspection level Ⅰ

Normal inspection

Single sample inspection

1.0

　

4. INSPECTION CONDITIONS

1). THE ENVIRONMENTAL

-Room temperature: 25±3℃

-Humidity: 65±20%RH

5. INSPECTION STANDARDS

1). VISUAL WHILE OPERATING

Items to be inspected

Inspection standard

. No display

. If any pattern is not active at all, they can be rejected.

.Irregular operating

. No irregular operating are allowed

. Appeared different display, which they should be chosen in the pattern, or appeared in different position where they should be chosen.

.Irregular display

. Any segment doesn’t active, they can be rejected.

. Over current

. The total current required to activate the module should not be exceed the MAX current in specification.

.View angles

. Valves that don’t meet the minimum value noted in the specification. they can be rejected.

.Contrast

. Valves that don’t meet the minimum value noted in the specification, they can be reject.

.LCD operate voltage

. Meet the specification.

　

2). Visual while not operating

Module dimension

. Meet the module outline drawing, not exceed the tolerance.

LCD panel scratch

.Following scratches inside the effective viewing area considered as the defects when their width & length are larger than the following combinations.

Number: one or more Width: 0.15 length: 5.0

two or more Width: 0.10 length: 3.0

three or more Width: 0.05 length: 2.0

When the defects exceed this, it can be rejected.

6.RELIABILITY

Standard Specification for Reliability of General-purpose LCM

Test Item

Test Condition

Note

High Temperature Store

60℃,200hr.

2

Low Temperature Store

-10℃,200hr

2

Humidity Store

60℃,90%RH,96hr

1,2

High Temperature Operation

40℃,typical operating conditions,200hr

 　

Temperature

Cycling

-10℃ to 25℃ to 60℃ to 25℃

10 min. between each step temp

50 min. at each step. 5 cycles

1,2

Mechanical

Vibration

10 to 55Hz sweep, 3G, ampl.=10mm(max) XYZ for 10 min, each.

　

Note 1: Condensation of water is not permitted on the module.
Note 2: The module should be inspected after 1 hour storage in normal
conditions (15 to 35℃,45 to 65%RH)

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