PCB Flexure Comparison Testing

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PCB Flexure Comparison Testing NMC Standard
NMC-P Soft Terminal Ceramic Chip Capacitor MLCCs

• ? Ceramic Capacitors www.niccomp.com/ceramic
• Specification NMC-P series www.niccomp.com/catal
  og/nmcp.pdf
• FREE Samples www.niccomp.com/samples
• Technical Support tpmg_at_niccomp.com

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NMC vs. NMC-P in PCB Flexure Testing
? PCB Flexure Comparison Testing NMC standard
NMC-P Soft Terminal Ceramic Chip Capacitor MLCCs

Test PCB

• PCB Deflection 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm,
  4.0 mm, 5.0 mm, 6.0 mm, 7.0 mm, 8.0 mm, 9.0 mm,
  10.0 mm
• Test Samples n 10 pieces
• Monitor 1KHz Capacitance Value / Failure
  Criteria ?C of 12.5

Case Size (Cap / Voltage) PCB Deflection Percentage Failures Percentage Failures
Case Size (Cap / Voltage) PCB Deflection NMC Series (Standard Terminal) NMC-P Series (Polymer Soft Terminal)
Case Size (Cap / Voltage) PCB Deflection PN NMC0805X7R104K100 PN NMC-P0805X7R104K100
0805 (0.1uF / 100V) 1.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
0805 (0.1uF / 100V) 1.5 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
0805 (0.1uF / 100V) 2.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
0805 (0.1uF / 100V) 3.0 mm 10 0 / 10 (No Failures)
0805 (0.1uF / 100V) 4.0 mm 30 0 / 10 (No Failures)
0805 (0.1uF / 100V) 5.0 mm 80 0 / 10 (No Failures)
0805 (0.1uF / 100V) 6.0 mm 90 0 / 10 (No Failures)
0805 (0.1uF / 100V) 7.0 mm 100 0 / 10 (No Failures)
0805 (0.1uF / 100V) 8.0 mm 100 0 / 10 (No Failures)
0805 (0.1uF / 100V) 9.0 mm 100 0 / 10 (No Failures)
0805 (0.1uF / 100V) 10.0 mm 100 0 / 10 (No Failures)
No failures to 10mm deflection
10 out of 10 failures by 7.0mm deflection
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NMC vs. NMC-P in PCB Flexure Testing
? PCB Flexure Comparison Testing NMC standard
NMC-P Soft Terminal MLCCs
Case Size (Cap / Voltage) PCB Deflection Percentage Failures Percentage Failures
Case Size (Cap / Voltage) PCB Deflection NMC Series (Standard Terminal) NMC-P Series (Polymer Soft Terminal)
Case Size (Cap / Voltage) PCB Deflection PN NMC0805X7R104K100 PN NMC-P0805X7R104K100
1206 (0.01uF / 500V) PN NMC1206X7R103K500 PN NMC-P1206X7R103K500
1206 (0.01uF / 500V) 1.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1206 (0.01uF / 500V) 1.5 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1206 (0.01uF / 500V) 2.0 mm 20 0 / 10 (No Failures)
1206 (0.01uF / 500V) 3.0 mm 80 0 / 10 (No Failures)
1206 (0.01uF / 500V) 4.0 mm 100 0 / 10 (No Failures)
1206 (0.01uF / 500V) 5.0 mm 100 0 / 10 (No Failures)
1206 (0.01uF / 500V) 6.0 mm 100 0 / 10 (No Failures)
1206 (0.01uF / 500V) 7.0 mm 100 0 / 10 (No Failures)
1206 (0.01uF / 500V) 8.0 mm 100 0 / 10 (No Failures)
1206 (0.01uF / 500V) 9.0 mm 100 0 / 10 (No Failures)
1206 (0.01uF / 500V) 10.0 mm 100 0 / 10 (No Failures)
1210 (1.0uF /100V) PN NMC1210X7R105K100 PN NMC-P1210X7R105K100
1210 (1.0uF /100V) 1.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1210 (1.0uF /100V) 1.5 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1210 (1.0uF /100V) 2.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1210 (1.0uF /100V) 3.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1210 (1.0uF /100V) 4.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1210 (1.0uF /100V) 5.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1210 (1.0uF /100V) 6.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1210 (1.0uF /100V) 7.0 mm 10 0 / 10 (No Failures)
1210 (1.0uF /100V) 8.0 mm 50 0 / 10 (No Failures)
1210 (1.0uF /100V) 9.0 mm 100 0 / 10 (No Failures)
1210 (1.0uF /100V) 10.0 mm 100 0 / 10 (No Failures)
No failures to 10mm deflection
10 out of 10 failures by 4.0mm (1206) 9.0mm
(1210) deflection
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NMC vs. NMC-P in PCB Flexure Testing
? PCB Flexure Comparison Testing NMC standard
NMC-P Soft Terminal MLCCs
Case Size (Cap / Voltage) PCB Deflection Percentage Failures Percentage Failures
Case Size (Cap / Voltage) PCB Deflection NMC Series (Standard Terminal) NMC-P Series (Polymer Soft Terminal)
2220 (2.2uF / 25V) PN NMC2220X7R225K25 PN NMC-P1206X7R225K25
2220 (2.2uF / 25V) 1.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
2220 (2.2uF / 25V) 1.5 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
2220 (2.2uF / 25V) 2.0 mm 20 0 / 10 (No Failures)
2220 (2.2uF / 25V) 3.0 mm 60 0 / 10 (No Failures)
2220 (2.2uF / 25V) 4.0 mm 90 0 / 10 (No Failures)
2220 (2.2uF / 25V) 5.0 mm 100 0 / 10 (No Failures)
2220 (2.2uF / 25V) 6.0 mm 100 0 / 10 (No Failures)
2220 (2.2uF / 25V) 7.0 mm 100 0 / 10 (No Failures)
2220 (2.2uF / 25V) 8.0 mm 100 0 / 10 (No Failures)
2220 (2.2uF / 25V) 9.0 mm 100 0 / 10 (No Failures)
2220 (2.2uF / 25V) 10.0 mm 100 0 / 10 (No Failures)
No failures to 10mm deflection
10 out of 10 failures by 5.0mm deflection
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NMC vs. NMC-P in PCB Flexure Testing
? PCB Flexure Comparison Testing NMC standard
NMC-P Soft Terminal MLCCs
Cross-Sectional Analysis Comparison After
de-mounting from test PCB, performed
cross-sectional comparison to allow inspection of
internal structure
NMC Series
NMC-P Series
PCB flexure MLCC cracking Low IR, Short failure
mode

• Summary
• All standard terminal (NMC series) samples
  exhibited failure under PCB flexure testing
• Failure mode defined as capacitance decrease
  12.5 and low insulation resistance (IR)
• Cracking in ceramic microstructure (as shown in
  above image, left) is cause of the failure
• None of the NMC-P series (polymer soft terminal)
  exhibited failure
• No cracking was observed in NMC-P series
  (polymer soft terminal)

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NMC vs. NMC-P in PCB Flexure Testing
? Polymer Layer Open Circuit Function   Example
of polymer layer terminal separation (open
circuit) for NMC-P Series (Polymer Soft Terminal)
under 10mm PCB deflection   PCB Deflection 1.0
mm, 1.5 mm, 2.0 mm, 3.0 mm, 4.0 mm, 5.0 mm, 6.0
mm, 7.0 mm, 8.0 mm, 9.0 mm, 10.0 mm Test Samples
n 10 pieces Monitor 1KHz Capacitance Value /
Failure Criteria ?C of 12.5  
Case Size (Cap / Voltage) PCB Deflection Percentage Failures Percentage Failures
Case Size (Cap / Voltage) PCB Deflection NMC Series (Standard Terminal) NMC-P Series (Polymer Soft Terminal)
1812 (0.47uF / 250V) PN NMC1812X7R474K250 PN NMC-P1812X7R474K250
1812 (0.47uF / 250V) 1.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1812 (0.47uF / 250V) 1.5 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1812 (0.47uF / 250V) 2.0 mm 0 / 10 (No Failures) 0 / 10 (No Failures)
1812 (0.47uF / 250V) 3.0 mm 10 0 / 10 (No Failures)
1812 (0.47uF / 250V) 4.0 mm 40 0 / 10 (No Failures)
1812 (0.47uF / 250V) 5.0 mm 70 0 / 10 (No Failures)
1812 (0.47uF / 250V) 6.0 mm 80 0 / 10 (No Failures)
1812 (0.47uF / 250V) 7.0 mm 90 0 / 10 (No Failures)
1812 (0.47uF / 250V) 8.0 mm 100 0 / 10 (No Failures)
1812 (0.47uF / 250V) 9.0 mm 100 0 / 10 (No Failures)
1812 (0.47uF / 250V) 10.0 mm 100 2 / 10 (Open Circuit)
DPA of Failed Sample
No failures to 9mm deflection 2 out of 10
failures at 10mm deflection
10 out of 10 failures by 8.0mm deflection
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NMC vs. NMC-P in PCB Flexure Testing
? Polymer Layer Open Circuit Function   Example
of polymer layer terminal separation (open mode)
for NMC-P Series (Polymer Soft Terminal) under
10mm PCB deflection  
Cross-Sectional Analysis
Cross-Sectional Analysis Magnified view Polymer
layer opened under 10mm PCB deflection Component
is undamaged
PCB flexure Open failure mode
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Resources

• ? Specification NMC-P series
  www.niccomp.com/catalog/nmcp.pdf
• Quick Builder, component selection made easy
  www.niccomp.com/QB-ceramic
• FREE Samples www.niccomp.com/samples
• NIC Contacts
• Sales support _____________________
• Technical support tpmg_at_niccomp.com

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