Custom Seals

Hermetic Seal Types

 Ceramax Seal

  • Ceramax is a patented phase changing compound that provides superior hermetic reliability and outstanding electrical performance with an operational temperature range of -269C to +450C.
  • Effective for products with an electrical performance that is less than 2 GHz and vacuum applications. 
  • Ceramax seals are compatible with high expansion metal alloys giving Winchester the ability to seal copper alloy contacts into connector shell materials not possible with competing technologies.
  • Aluminum, titanium and high expansion stainless steel alloys are just a few of the shell materials available.

Original Glass Seal

  • Glass feedthroughs are particularly useful for high frequency match impedance connectors due to the crystalline amorphous properties of the glass which promote low loss signal transmissions.
  • Effective for products with an electrical performance that is greater than 2 GHz.
  • Compatible with iron alloys.

Oxide Free Glass Seal

Winchester’s oxide free glass seal eliminates the need for pre-oxidizing of the metal components prior to glass sealing. This lack of heavy oxide interface between glass and metal allows for:

  • Increased pressure withstanding
  • Higher levels of hermeticity
  • Repeatable, reliable processing
  • Eliminates the need for post oxide removal leaving the glass and metal clean, free of etching residue

Unique Hermetic Metallurgy

Explosion Welding

  • A solid state process that uses chemical explosives to accelerate one metal into another at a high velocity to create a welded interface between the two metals.
  • Creates bonds between metals that cannot necessarily be welded by conventional means.

Vacuum Brazing

  • A joining process whereby a filler metal is heated to its melting temperature above 450C and distributed between two or more base materials while protected by an oxygen free (vacuum) atmosphere.
  • High density, oxide free joints are created between the parent materials.
  • Materials that cannot be bonded using other brazing processes are joined.

Laser Welding

  • A non-contact welding process that creates fusion and is ideally suited for assembly and integration of hermetic connectors due to its precise application and small heat affected zone.
  • Very small connector components can be joined together and connectors can be mounted into higher level assemblies without distortion or damage.