A
glass-to-metal seal is a leak tight joint consisting of glass and metal fused
together.
INTA
Technologies Corporation specializes in glass to metal feedthrus under the
tutelage of Dr. Nutan Bhiwandker, Material Scientist. INTA manufactures vacuum tight connectors using glass as an insulator. The glass connects a metal housing and metal pins. The number of pins ranges 1-100+.
Special
glass is used. Glass-to-metal seals are commonly used for
feedthru’s. One typical glass used by INTA is alkali barium silicate
glass (another is borosilicate) which is a lead free compression sealing glass
manufactured by Schott.
CTE:
93 20-300 deg C (10^-7/deg C)
Dielectric
constant: 6.7
Loss
factor: 1.41%
For
further details contact Blake Kneedler, Engineering Estimator 408-748-9955 x113 bkneedler@intatech.com or Dr. Nutan
Bhiwandker, Material Scientist 408-748-9955 x101 nbhiwandker@intatech.com
Pricing
depends on various factors including size of items, complexity of project and
volume. Smaller items are generally less expensive.
Yes,
in some cases. In other cases, the
customer supplies some or all of the materials.
Yes.
When sending a request for quotation (RFQ) please indicate if the material will
be customer supplied or INTA supplied.
Lead
times depend on several factors, such as material lead times and amount of
fixturing and/or tooling required. If the customer supplies the material,
the lead time is often 1-2 weeks. If INTA Technologies supplies the
materials, it will likely add several weeks to the lead time. Tooling and
fixtures for proper glass-to-metal seals are often required.
Yes. For specific ratings contact B.Kneedler,
Manufacturing Engineer 408-748-9955 x113
INTA
Technologies can seal very small parts in the range of tens of mils
(millimeters). Each project is unique, contact us for a free design
review and quote.
INTA
Technologies is limited in terms of maximum size for active metal
brazing. Typically, items larger than 12” in diameter and/or longer than
12” may be currently too large for INTA to glass-to-metal seal.
In
many cases, yes. The service is called expedite, speak to Sara Sharma (Customer Service) for further details. 408-748-9955 x202
INTA
inspects and tests the components before acceptance. Many parts are 100%
tested visually and with instruments such as an Alcatel helium leak
checker. Other equipment includes a hydrotester and presses. For
further details please contact our glass-to-metal specialist, Dr. Nutan
Bhiwandker, Material Scientist 408-748-9955 x101 nbhiwandker@intatech.com
or Quality Manager, George Baltazar 408-748-9955 x123 or gbaltazar@intatech.com
INTA
Technologies’ customers supply the glass in many cases. INTA occasionally buys glass for production processes
and testing.
http://en.wikipedia.org/wiki/Glass-to-metal_seal
Information
on the history of glass-to-metal seals.