What We Do.
Glass to Metal Sealing
Custom Machining vs. Tooling
Power & Hybrid Packages
The term "Hermetically Sealed" is derived from Greek-Egyptian mythology, with Hermes Trismegistus magically sealing treasure chests to keep them impervious to entry. Today, Sinclair's hermetic packages keep your sensitive electronic devices protected from the harsh environments of space, atmosphere, and sea depths.
Glass-to-metal sealing involves the process of bonding glass & metal to create a hermetic seal, allowing isolated electrical current through a metal wire from outside of the metal package to the inside, without compromising the environment inside. The sensitive electronic components housed inside the package remain protected from the harsh environment outside, receiving current through the isolated wires only. Optical-quality glass can also be used to transmit visible & non-visible wavelengths of light to optical sensors inside the metal package.
Ceramic to metal seals accomplish the same thing as glass seals do, but certain designs, materials, & work environments lend themselves better to using ceramic than glass. Ceramic insulators are metalized and brazed to the metal package to produce a hermetic seal.
CNC Machining has revolutionized the production of hermetic packages, but there are trade-offs vs. the creation of hard tooling. Tooling can allow for a lower cost part that's easily stamped out in large production runs, but making a design change to a part produced off tooling may cause production delays as the tools are modified.
Sinclair's Microwave Packages focus on creating a glass-to-metal seal with a 50-Ohm resistance. Glass & Wire diameters & material types are chosen to create this resistance level. Sinclair can manufacture virtually any custom machined configuration in a variety of materials & feedthru options.
Custom FIber-Optic Packages for Telecommunications use are typically machined from Kovar or other nickel-iron alloys, and employ a number of different Fiber Entry methods. Fiber tubes can be machined directly as an integrated part of the housing, or a more simple drawn or machined tube may be brazed in. The connectors listed in Microwave Packages also apply to Fiber-Optic Packages. Whatever your requirements, Sinclair can meet your Fiber-Optic Package needs.
Sinclair's Power Packages typically employ the use of a copper-cored nickel-iron alloy wire to allow for higher-current requirements in a Glass-to-metal seal hermetic package. Ceramic seals may be used to accomodate a completely copper or Glidcop wire for even higher electrical currents. High-Conductivity base materials such as Copper, Copper-Tungsten, & Giidcop are also used for greater heat dissipations. Standard sizes such as JEDEC TO-254, TO-257, TO-258, TO-259, TO-265, MO-078, MO-079 are available with Open Tooling. Custom options are also available on all Power Packages.
Optical Windows keep components safe from outside environments while allowing optical transmission to a sensor inside the metal shell or housing. Optical materials include Borosilicate Glass for use with Kovar, or Soda Lime Glass for use with Stainless Steel. UV, Sapphire, Quartz, and special Filter Glasses are also available depending on what the optical transmission needs are.
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Quality Custom Hermetic Packages