tin whisker growth test report report #: wg-07-007...tin whisker growth for package 8msop after 1000...
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Report #: WG-07-007 Page 1 of 12
MAXIM 8MSOP(Sn), 16TSLP(3*3) & SOT23-5-Cu (Sn)
Tin Whisker Growth Test Report Report #: WG-07-007
DISCLAIMER: PRODUCT RELIABILITY REPORT IS CONSIDERED PROPRIETARY TO UNISEM AND IS FURNISHED BY UNISEM ON THE SOLE CONDITION THAT THE USER AGREES NOT TO DISCLOSE ANY CONTENTS OF THE PRODUCT RELIABILITY REPORT TO A THIRD PARTY AND MAY NOT BE REPRODUCED WITHOUT PERMISSION. INFORMATION CONVEYED IN THIS REPORT IN NO WAY CHANGES OR ALTERS UNISEMâS ASSEMBLY WARRANTY POLICY AND UNDER NO CIRCUMSTANCES COULD THIS REPORT BE USED AS AN AUTHORIZATION TO RETURN PRODUCT TO UNISEM.
Date of Release: 20-May-2008
PRODUCT RELIABILITY LABUnisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Type test (With Preconditioning At 215ÂșC/260ÂșC Reflow for 3 cycles):
1500 cycles Temperature Cycling (TC) 4000 hours High Temperature Humidity Storage (HTHS)
4000 hours Ambient Temperature Humidity Storage Test (ATHS)
Report #: WG-07-007 Page 2 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Lot Information:
# Package Lot# Serial # Device# Lead Frame Part#
1 8MSOP(Sn) MAXST*T8VAHA158B MS73221 MAX1790EUA+ 401114 2 16TSLP(3*3) MAXSP*SIY1IA212A TL28496 MAX9722BETE+TG104 421938 3 SOT-23-5-Cu(Sn) MAXPP*SPB0CA015D ST03880 MAX7377AXRD+T 401948
Requestor NC Wong Date Received 18-Sep-07 Prepared by Hazaham Date Completed 20-May-08 Approved by Peggy Cheah Date Approved 20-May-08
Test Plan:
Serialize Samples (Minimum 3lots-2 samples/lot)
Initial Pre-Test Inspection (Min. Mag. 300X)
Whisker Found?
1500 cycles TC 0/500/1000/1500
cyc
4000 hours ATHS [167 days]
0/1000/1500/2000/3000 /4000 hours
4000 hours HTHS [167days]
0/1000/1500/2000/3000 /4000 hours
Full scan for max 96 lead for 6 longest whisker measurement. Reject?
Fail &Report
Screening / Detailed Inspection (MinMag. 300X)
Whisker Found?
Full scan for max 96 lead for 6 longest whisker
Reject?
Fail & Report
Yes
No
Pass &Report
No
No No
Yes
Yes
Yes
Preconditioning Test- Reflow at 215ÂșC/260ÂșC
For 3 cycles
Report #: WG-07-007 Page 3 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Test Condition:
Stress Test Test Conditions
Temperature Cycling Test Temperature = -55°C (+0/-10°C) to 85°C (+10/-0°C),
air to air; 10 minute soak; ~ 3 cycles / hour
High Temperature Humidity Storage Test
Temperature = 55°C (±3°C) Relative Humidity = 85% (±3°C)
Ambient Temperature Humidity Storage Test
Temperature = 30°C (±2°C) Relative Humidity = 60% (±3%)
Test Interval And Duration (Technology):
Durations Stress Type Inspection
Intervals Class 1 and 2 Products Class 1 A Products
Temp. Cycling Test 500 cycles 1500 cycles 1000 cycles High Temp. Humidity Storage Test 1000 hours 4000 hours 1000 hours
Ambient Temp. Humidity Storage Test 1000 hours 4000 hours 1000 hours Maximum Allowable Whisker Length:
Maximum Allowable Whisker Length (micron) Consideration Stress
Type [Class 2] Telecommunication Product
[Class 1] Industrial Product
[Class 1A] Consumer Product
TC 45 ”m 50 ”m HTHS 20 ”m 50 ”m
Components with a lead to lead gap †320”m
ATHS 20 ”m TC 45 ”m 50 ”m
HTHS Components with a lead to lead gap > 320”m
ATHS 20 ”m 40 ”m 75 ”m
Note: Unisem standard is Class 2 and Maximum Allowable Whisker Length is 45”m for TC and 20”m for storage tests based on manufacturing Process Change Acceptance Criteria Reference:
- Unisem Internal Specification UMRT-00-11/Rev H [Tin Whisker Growth Test] - JESD201-Environmental Acceptance Requirements for Tin Whisker Susceptibility of Tin
and Tin Alloy Surface Finishes - JESD22A121- Measuring Whisker Growth on Tin and Tin Alloy Surface Finishes
Report #: WG-07-007 Page 4 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Temperature Cycling Test: (A) Test Type : Temperature Cycling ( Reflow at 215ÂșC)
Test Condition : -55ÂșC (+0/-10ÂșC) to 85ÂșC (+10/-0ÂșC) Test Duration : 1500 cycles Inspection Interval : 500 cycles
TC Point (Cycles) /Maximum Whisker Length (”m) # Package Type 0 500 1000 1500
1 8MSOP(Sn) 0/6 - 0/6 - *0/6 16.9 *0/6 19.7 2 16TSLP(3*3) 0/6 - 0/6 - 0/6 - 0/6 - 3 SOT-23-5-Cu(Sn) 0/6 - 0/6 - 0/6 - *0/6 16.2
(B) Test Type : Temperature Cycling ( Reflow at 260ÂșC)
Test Condition : -55ÂșC (+0/-10ÂșC) to 85ÂșC (+10/-0ÂșC) Test Duration : 1500 cycles Inspection Interval : 500 cycles
TC Point (Cycles) /Maximum Whisker Length (”m) # Package Type
0 500 1000 1500 1 8MSOP(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 2 16TSLP(3*3) 0/6 - 0/6 - 0/6 - 0/6 - 3 SOT-23-5-Cu(Sn) 0/6 - 0/6 - 0/6 - *0/6 14.2
Conclusion: Tin whisker growth for package 8MSOP after 1000 cyc and SOT-23-5-Cu after 1500 cyc. However, all packages have passed Maximum Allowable Whisker Length Criteria after TC 1500 cycles as refer to Unisem Internal Specification UMRT00-11.
Report #: WG-07-007 Page 5 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
High Temp. Humidity Storage Test: (A) Test Type : High Temp. Humidity Storage Test (Reflow 215ÂșC)
Test Condition : 55ÂșC (±3ÂșC) ,RH 85% (±3%) Test Duration : 4000 hours Inspection Interval : 1000 hours
HTHS Point (hours)/ Maximum Whisker Length (”m) #
Package Type 0 42
(1000hours) 84
(2000hours) 125
(3000hours) 167
(4000hours)1 8MSOP(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 2 16TSLP(3*3) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 3 SOT-23-5-Cu(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 -
(B) Test Type : High Temp. Humidity Storage Test (Reflow 260ÂșC)
Test Condition : 55ÂșC (±3ÂșC) ,RH 85% (±3%) Test Duration : 4000 hours Inspection Interval : 1000 hours
HTHS Point (hours)/ Maximum Whisker Length (”m)
#
Package Type 0 42
(1000hours) 84
(2000hours) 125
(3000hours) 167
(4000hours)1 8MSOP(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 2 16TSLP(3*3) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 3 SOT-23-5-Cu(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 -
Conclusion: No whisker growth observed after 4000 hours HTHS .
Report #: WG-07-007 Page 6 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Ambient Temp. Humidity Storage Test (A) Test Type : Ambient Temp. Humidity Storage Test (Reflow 215ÂșC)
Test Condition : 30ÂșC (±2ÂșC) ,RH 60% (±3%) Test Duration : 4000 hours Inspection Interval : 1000 hours
AHTHS Point (hours)/ Maximum Whisker Length (”m)
#
Package Type 0 42
(1000hours) 84
(2000hours) 125
(3000hours) 167
(4000hours)1 8MSOP(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 2 16TSLP(3*3) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 3 SOT-23-5-Cu(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 -
(B) Test Type : Ambient Temp. Humidity Storage Test (Reflow 260ÂșC)
Test Condition : 30ÂșC (±2ÂșC) ,RH 60% (±3%) Test Duration : 4000 hours Inspection Interval : 1000 hours
AHTHS Point (hours)/ Maximum Whisker Length (”m) #
Package Type 0 42
(1000hours) 84
(2000hours) 125
(3000hours) 167
(4000hours)1 8MSOP(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 2 16TSLP(3*3) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 - 3 SOT-23-5-Cu(Sn) 0/6 - 0/6 - 0/6 - 0/6 - 0/6 -
Conclusion: No whisker growth observed after 4000 hours ATHS.
Report #: WG-07-007 Page 7 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Appendix A1: SEM Image For Tin Whisker Growth Test â TC Reflow At 215ÂșC :
Package Inspection Interval/Hours 8MSOP(Sn) 16TSLP(3*3) SOT-23-5-Cu (Sn)
0
500
1000
1500
16.9um
19.7um 16.2um
Report #: WG-07-007 Page 8 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Appendix A2: SEM Image For Tin Whisker Growth Test â TC Reflow At 260ÂșC :
Package Inspection Interval/Hours 8MSOP(Sn) 16TSLP(3*3) SOT-23-5-Cu (Sn)
0
500
1000
1500
14 2 um
Report #: WG-07-007 Page 9 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Appendix B1: SEM Image For Tin Whisker Growth Test â HTHS Reflow At 215ÂșC :
Package Inspection Interval/Hours 8MSOP(Sn) 16TSLP(3*3) SOT-23-5-Cu (Sn)
0
1000
2000
3000
4000
Report #: WG-07-007 Page 10 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Appendix B2: SEM Image For Tin Whisker Growth Test â HTHS Reflow At 260ÂșC :
Package Inspection Interval/Hours 8MSOP(Sn) 16TSLP(3*3) SOT-23-5-Cu (Sn)
0
1000
2000
3000
4000
Report #: WG-07-007 Page 11 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Appendix C1: SEM Image For Tin Whisker Growth Test â ATHS Reflow At 215ÂșC:
Package Inspection Interval/Hours 8MSOP(Sn) 16TSLP(3*3) SOT-23-5-Cu (Sn)
0
1000
2000
3000
4000
Report #: WG-07-007 Page 12 of 12
PRODUCT RELIABILITY LAB Unisem (M) Berhad No.1 Persiaran Pulai Jaya 9, Kawasan Perindustrian Pulai Jaya, 31300 Ipoh, Perak, Malaysia
Appendix C2: SEM Image For Tin Whisker Growth Test â ATHS Reflow At 260ÂșC:
Package Inspection Interval/Hours 8MSOP(Sn) 16TSLP(3*3) SOT-23-5-Cu (Sn)
0
1000
2000
3000
4000