Electrical Relay and Connection Technology

Precious Metal Clad Materials

Multi-layer and multi-strip tapes available. Your choice of width and thickness in long lengths.

Precious metals clad on strips of copper and iron based alloys. Multi-layer and multi-strip tapes of variable widths and thicknesses are produced using Tanaka's own unique continuous bonding process. These materials demonstrate the highest level of performance while utilizing a minimum amount of precious metals. Beryllium copper based tapes and solder clad materials are also available.

Precious Metal Clad Materials

Features

  • Available in a wide range of thicknesses, from 0.5 µm to 50% of total thickness.
  • High bonding strength allows a high degree of bending.
  • We supply a long length tapes with a high precision finish.
Total plate thickness (mm) Tolerance (mm)
Thickness Width
< 0.05 ±0.003 ±0.05
0.05 to < 0.10 ±0.005 ±0.05
0.10 to < 0.30 ±0.01 ±0.1
0.30 to < 0.60 ±0.02 ±0.15
0.60 to 1.00 ±0.03 ±0.2

Cross-section of bond part

Cross-section of bond part
Examples of material combinations
Precious Metals Base material Shape Total thickness (mm) Total width (mm) Cladding width (mm) Cladding thickness ratio (mm)
AgPd
AgPdCu
SP-1
SP-2
C7701
MX215
MX96
CuNi20
C5212
I 0.025~0.5 7~30 0.5~5.0 1/20~1/2
AgCuNi
CDF-2
AgNi
C1020
C2680
C5212
I 0.1~1.0 7~50 1.0~10.0 1/20~2/3
Ag BFM * KOV O 0.05~0.6 7~30 7~30 1/15~1/3

* Brazing Filler Metals

  1. For shapes,"1" indicates an inlay type and "0" indicates an overlay type.
  2. Contact us regarding materials, shapes and dimensions.

Width Precision

Width Precision
  • W1,W2 = ±0.3
Width Precision

Applications

  • Micro-motor brushes, commutator
  • sensors, switches, relays, connectors, etc.

Types of Bonding Materials

Main Applications: Micro-motor brushes, sensors
Name Composition(wt%) Vickers
hardness (reference value)
Pt Au Ag Pd Other
SP-1 10 10 30 35 Cu, others 270~360
SP-3 0.5 40 43 Cu 230~320
AgPd50 50 50 160~230
GDB-1 67 30 Other 150~220
AgPd30 70 30 140~210
Main Applications: Micro-motor commutators, slide switches
Name Composition(wt%) Vickers
hardness (reference value)
Pt Au Ag Pd Other
SP-2 5 70 10 Cu, others 170~210
CDF-10 90 Cu, others 125~175
CDF-2 92.5 Cu, others 120~170
AgCuNi 95.5 Cu, others 110~160
CDF-4 98.2 0.5 Cu, others 85~150

Types of base materials

  • Tanaka provides clad products with a base material tailored to the application including C1020, C5210, C7701, CuNiSn alloys, BeCu, Kovar, and Corson alloys. Please inquire regarding combinations with bonding materials.