2,808
edits
Changes
→6.3 Design Technologies for Contacts
|Economic manufacturing for partially plated parts; hard gold with Ni intermediate layer possible but has limited formability
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|Clad contact materials (Contact Bimetals)Selectively electroplated pre-stamped strips, totally covered or with inlayed stripsSpot gold plating|Ductile Continuous partial electroplating of pre-stamped and coined contact spots; allprecious metals on ; intermediate layers of Cu and Cu alloys, minimum precious metal layer 2% or Ni; selective tinning of total strip thickness for Ag connector contact areas and Ag alloys, 0.5% of total strip thickness for Au alloys (with Ni intermediate layer), max. inlayed thickness 50% of totalterminal ends; carrier materials up to 1 mm thick, strip width starting at 2 up to ~ 80 mm|Clad contact springs; stamped and formed Precious metal plating of switching contacts, connector parts for communications , and power engineering; aluminum clad for bonding capabilityterminal pins in the communication technology|Metallurgical bond; inlayed strip stamped perpendicular or at angle Crack-free and wear resistant layers possible since contact areas are already formed to strip direction; avoid bends at the cladding edgesfinal shape
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|Strips or Sputtered profiles with brazed contact material layers (Toplay material)|AgAu, Ag Au alloys, Ag/Ni, Ag/MeO on Cu and Cu alloy carriers, total width 10 ~ 100mm, carrier in any composition; layer thickness 0.3 1 – 5 mm, Ag strip cross section from 0.3 x 3 mm<sup>2</sup>, strip thickn. to be ≤ carrier thickn.μm|Stationary Contact profiles for relays, switches and moving contact bridges for power engineering switching deviceskeyboard contacts in the information and measuring technology|Contact High purity contact layers brazed with Ag brazing alloys; strips re-hardened during profile rollingfor high reliability
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|SeamHot-welded contact dip tinned strips or profiles|Wire, strip, miniature profiles (solid All around or clad) welded to Cu alloy carrier strip (0.3 – 3 mm Ø or up to 5 mm width)stripe tinning 1 ~ 15 μm|Switches, pushbuttons, relays, auxiliary contactors, sliding contacts|Broad usability, highly economical, thin spring hard carriers can be used|-|Miniature profiles (Weld tapes)|Mostly high precious contact materials, double or multi layer, Ni, Monel, or Cu alloy carrierConnectors for automotive and consumer technology; miniature-profile width 0.2 – 2 mm|Welded profile segments for contact parts in communication, measurement screw and control engineeringcrimp connectors|Manufacturing of cross-directional contact spotsEconomic coating method; most economical precious metal usagedoes not form (Sn) whiskers
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