1. 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

2. 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

3. Characteristics of thin film Accurate Low TCR Low noise Better high frequency performance

4. Micro Cracks Laser trimming trace Thin Film Power Trimming: thin film vs. thick film

5. Resistance material of RR Resistance material of Thick Film Ni-Cr alloyMetal & Insulator composite Current flow is practically even not even Current flow is Why does thin film has low current noise?

6. Current Noise: thin film vs. thick film Thick film

7. High Frequency Performance Skin effect

8. Structure: RR vs. RG Resistor film Epoxy resin coating (2 layers) RG series RR series Resistor film Base layer: Inorganic passivation film Top layer: Epoxy resin coating

9. Sputtering Electrode & Resistance Forming Trimming Cleaning & Coating Marking Side Electrode Forming RG (New) RR 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

10. Reliability Specification Comparison between RG and RR series Item RG SeriesRR Series ConditionDriftConditionDrift Moisture Load Life THB: 85 o C-85% 1000 hours +/-0.1% 40 o C-95% 1000 hours +/- 0.5% Load Life 85 o C (rated power) 1000 hours +/- 0.1% 70 o C ( rated power) 1000 hours +/- 0.5% High Temperatur e Exposure 155 o C (no load) 1000 hours +/- 0.1% 125 o C (no load) 1000 hours +/- 0.5% Operation at 125 o C is possible (Derating is needed) Operation at 125 o C is not possible

11. High Temp. exposure Comparison with Thick-Film

12. RG characteristics summary Inorganic passivation Trimming through passivation Resistance tolerance : 0.02% TCR 5ppm Operating temp: 155 o C Extremely reliable: 0.011fit by accelerated tests.

13. 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

14. Summary Thin Film Advantage: Accuracy, Low TCR, Low noise, frequency performance Regular RR series and high precision/highly reliable RG series RG series extremely reliable Precision network (RM series) available