Introduction Purpose To introduce and familiarize Susumu thin film chip resistors Objectives Basic...
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Transcript of Introduction Purpose To introduce and familiarize Susumu thin film chip resistors Objectives Basic...
Introduction
Purpose• To introduce and familiarize Susumu thin film chip resistors
Objectives• Basic difference between thin film and thick film resistors• Understanding thin film register characteristics• Introducing Sususmu’s two types of resistors: RR (precision)
and RG (high precision & reliable)
Content• 14 pages
Learning time• 10 minutes
Thin film vs thick film
• Thin film• Metal thin film
deposited in molecular/atomic process
• Thickness: nm• Better performance
• Thick film• Metal powder resin
composite screen printed
• Thickness: um• Generally considered
more reliable
Resistance material of RR Resistance material of Thick Film
Ni-Cr alloy Metal & Insulator composite
Current flow is practically even not even
Current flow is
Why does thin film has low current noise?
Current Noise: thin film vs. thick film
+/-15V PS, Bias Current Noise, 5.5 mAdc
1.0E-12
1.0E-11
1.0E-10
100 1000 10000 100000
Frequency (Hz)
A/r
tHz
Susumu RR Series
Jameco Thick Film
PS NoiseThick film
Structure: RR vs. RG
Resistor film
Epoxy resin coating
(2 layers)
RG seriesRG seriesRR seriesRR series
Resistor film
Base layer:Inorganic
passivation film
Top layer: Epoxy resin coating
Sputtering
Electrode & Resistance Forming
Trimming
Cleaning & Coating
Marking
Side Electrode Forming
RG (New)RG (New)RRRR
Inspection
Sputtering
Electrode & Resistance Forming
Cleaning
Trimming
Coating (Inorganic)
Marking
Side Electrode Forming
Inspection
Cleaning & Coating
YAG laser trims through the inorganic film without affecting it
Resin coat for mechanical protection.
Inorganic film
formation process
Process Comparison: RR vs. RG
Reliability Specification Comparison between RG and RR series
ItemRG Series RR Series
Condition Drift Condition Drift
Moisture Load Life
THB: 85oC-85%1000 hours
+/-0.1%40oC-95%
1000 hours+/- 0.5%
Load Life85oC (rated power)
1000 hours+/- 0.1%
70oC ( rated power)
1000 hours+/- 0.5%
High Temperature Exposure
155oC (no load)
1000 hours+/- 0.1%
125oC (no load)
1000 hours+/- 0.5%
Operation at 125oC is possible(Derating is needed)
Operation at 125oC is not
possible
RG characteristics summary
• Inorganic passivation
• Trimming through passivation
• Resistance tolerance : 0.02%
• TCR 5ppm
• Operating temp: 155oC
• Extremely reliable: 0.011fit by accelerated tests.
RM: chip resistor network with RG
•2 standard types
•Matching tolerance as low as 0.01%
•Matching TCR as low as +/- 1ppm
•Custom package available