21060 Corsair Blvd. Hayward, CA 94545

Vacuum Feedthroughs, Heating Elements, and Custom Thermal Systems for
Aerospace, University Research, Semiconductor, Medical and OEM Applications


Custom Thermal System Design and Application

Belilove's Custom Thermal Heating group offers custom industrial electric heaters, controllers, and sensors. We bring our thermal expertise to many applications, including analytical instrumentation, semiconductor, photovoltaic, medical equipment, plastics processing, foodservice equipment, packaging, aerospace and other industries.


  • Thermal Systems Applied to Your Application
  • 24 Hour Turnaround on Custom Drawings & Quotations
  • Custom Heater/Thermal Systems Ship in 3 Weeks
  • On-site engineering team to assist in your design
  • We can coordinate with your engineering team on solid models
  • Quick response to engineering questions 


The BCE Hem Sealed Heater™ incorporates both the cartridge heaters’ wire wound resistive element encased in a metal sheath and the vacuum compatibility of a feedthrough. Furthermore, the BCE proprietary epoxy seal allows the heater to pass strict electrical tests ensuring the purity of the dielectric materials and hence, preventing shorting. The BCE Hem Sealed Heater™ outperforms as heat flows uniformly from inside the cartridge directly to the heated bodies.


A very compact, fast responding electric heating element for liquids and gases for all clean, fuel cell, bio-med, laboratory, food, and pharmaceutical applications. Designed for heating of clean gases and liquids with the medium not exposed to chromium flakes or electrically charged resistors. High wattages and various voltages are available.


Industrial process tools used for memory devices, transistors, crystal silicon, microprocessors, photovoltaic (PV) cells, and thin film PV cells. All these applications required a shrewd knowledge of temperature, BCE continues to innovate and provide customer specific thermal solutions that are critical to next generation equipment and processes. Electric heaters that provide a very high level of temperature uniformity across the semiconductor wafer to ensure consistent quality plus highly repeatable and efficient wafer processing.

  • Immersion heaters using 316 Stainless Steel
  • Alumina heaters
  • Pedestal heaters
  • Bake/Chill Platens
  • Vacuum Ring Heaters
  • Bake/Chill Pedestals
  • Brazed in Vacuum Chamber Heaters
  • Clamp-in Coil Heaters


Heaters that are used in the electron ionization in gas chromatography and mass spectrometry to ionize and fragment analyte molecules before mass spectrometric analysis and detection. A typical electron ionization source exposes the analyte, under vacuum to a stream of thermionic electrons produced from a resistively heated-gas weldment assembly.  Gas heated up to 450°C.  Built-in thermocouple for precise temperature control is incorporated in the gas body assembly.


The SMARTFLOW liquid heater with its Reservoir Design is for applications where fast heating of liquids is required. All parts exposed to liquid flow are constructed of 304/316SS (other materials available). All units have built-in Type J or K TC with potential of added adapter for outlet flow. Wetted parts constructed of 316 stainless steel with liquid flow passing over an enclosed heated body. All threaded fittings are available such as NPT, SAE, BSP, VCR & more.


This specialized category of electric heating element is designed to provide extremely uniform temperature profiles across the length of the GC column. This uniformity accommodates a stable temperature environment for the capture of repeatable and consistent data between runs. Gas chromatograph heaters allow for very precise temperature ramping and set point control to very tight tolerances. This is critical because the slightest fluctuation in column temperature during analysis will have significant effect on analysis outcomes.

Mini Clean Flow Heater

HEM Sealed Heater™

Maintaining a high flow rate of cold propellants and optimizing flow in space launches.

Mini Clean Flow Heater

Mini Clean Flow Heater

A powerful, compact solution for heating moving liquids and gases.

Clamp-in Coil Heater

Clamp-in Coil Heater

Precise control and uniformity via custom watt densities and patterns.

Flanged Gasline Heater

Flanged Gasline Heater

For electron ionization in the gas chromatography and mass spectrometry industry.

Capillary Source Heater

Capillary Source Heater

Atmospheric pressure chemical ionization (APCI) heaters.

Doser Purge Heater

Doser Purge Heater

Electric heating element used in purging systems for nitrogen dosers.

Thick Film Technology

Thick Film Technology

High performance, fast response, electric heaters in a low mass, low profile package.

Thick Film Technology

CeraWatt Ceramic Heater

CeraWatt, 800°C Heater; High gas flow temperature; no metal exposure.

SuperCirc Clean Gas Heater


Liquid heater with fast, highly efficient heat transfer.

SuperCirc Clean Gas Heater

Kapton Etched Foil Heater

Fast Responding, low profile, low outgassing.

Thermowell Vacuum Assembly

Vacuum Thermowell & Heater Assembly

Simultaneously Heat and Monitor Wafer Temperatures

Vacuum Ring Heater

Vacuum Ring Heater

Provides uniform heat in vacuum chambers.

Submersible Heater

Submersible Heater

Designed for immersion in fluids or high humidity.

Coiled Immersion Heater

Coil Type Immersion Heater

Even heating, coiled immersion heaters with internal sensors and limits.

Copper Flange Heater

Gas Chromatograph Heaters

Gas Sample and columns heating.

Gas Chromatograph Heater

Nextgen "Heated Cube" for Gas Chromatograph

Compact heat source for next generation mass spectrometry.

Thick Film Technology
Thick Film Technology

Flexibility in Design - BCE Thick Film Technology

Need a high performance electric heater in a low mass, low profile package? Need to put high watt density in a small space? Or maybe you need to distribute wattage disproportionately to an irregularly shaped part? Chances are BCE can develop the perfect heater for your needs.

BCE ceramic thick film heaters are easily customized into a variety of shapes and sizes, and provide excellent heat transfer. Long life is assured by precise thermal matching between ceramics and resistor traces.

Excellent Choice for Many Industries

The ceramic substrates provide excellent hardness, wear resistance, and compression strength. The physical properties of the ceramic also provide optimal thermal conductivity and excellent uniformity. Thick film ceramic heaters are perfect for application in analytical equipment, life science equipment, mass spectroscopy, medical devices, semiconductor processing, packaging machines, and in applications ultra pure and chemically aggressive media.

Thick Film Technology

Key Benefits

  • Virtually unlimited in shape or size.
  • Single or double sides, one or two layers per side.
  • High purity applications no problem.
  • Precise control and uniformity via custom watt densities and patterns.
  • Distributed wattage for ideal application of heat to part with minimal losses.
  • Multiple heating zone capabilities for more precise control.
  • Available in virtually any voltage, AC or DC.
  • Integrated sensors including thermistors, thermostats, thermal fuses, and printed RTD's.
  • Wide variety of lead configurations conforming to shock and vibration, vacuum and purity standards.

Ceramic Thick-Film Heaters for OEM Analytical and Medical Equipment

Manufacturers of laboratory and process analytical equipment, as well as medical equipment, are continually challenged to make products smaller and more compact. Smaller, more efficient components are always in demand. Providing heat for sample stability or a chemical reaction is a common requirement. There's an ongoing challenge to find smaller and more efficient electric heaters.

Many traditional electrical heating elements are limited in size and efficiency due to the balance required between conductor temperatures and the heat transfer properties of the dielectric material used in their construction. Sometimes the mass required to insulate electrically is at odds with the ability to drive the heat into the part. Metal sheathed heaters use compacted magnesium oxide, or wafers of mica for dielectric. While these provide good electrical insulation, they also inhibit thermal transfer from resistance element to the external part. Flexible heating elements use a variety of rubbers or fluoropolymer elastomers that sandwich the resistance element. While these designs are dielectrically strong, and allow for excellent heat transfer, they are limited by the maximum operating temperatures and watt densities of the elastomer.

A newer, alternative technology is “thick-film” ceramic heaters, a process of depositing a resistor “trace” of tungsten paste on top of a ceramic part in a process very similar to screen printing. The deposition process allows for close control of thickness and width of the resistor, thus accurately controlling the conductor resistance, wattage, watt density, and uniformity of the heated part.

The use of ceramics as the heater body (referred to as a heated part), has many advantages. Ceramics are chemical inert, offer excellent thermal conductivity, impervious to moisture, and are very durable. The downside to using ceramics as heaters, however, is the difficulty in machining to very tight tolerances. In recent years though, many of the ceramic machining hurdles have been overcome through advanced ceramic machining processes.

In the early years of development thick-film ceramic heaters had a few major challenges. Dealing with mis-matched expansion coefficients between the ceramic substrate and the conductor trace was considerable. Years of research now have yielded excellent data on compatible materials making this problem much less significant. Another challenge is controlling the tolerance and repeatability of the heater resistance from part-to-part. Improvements and advancement in this area are made possible with laser etching, tighter screening procedures, and advanced machining.

The use of ceramics provided many interesting possibilities in heater design, and many materials were tested and researched. The most common ceramics used for thick-film heaters today are alumina (Al2O3), silicon nitride (Si3N4), beryllium oxide (BeO), and aluminum nitride (AlN). Each material has its own unique chemical and physical properties, but all exhibit good thermal conductivity and good dielectric properties.

The combination of excellent thermal conductivity, high dielectric, high watt densities, precise thermal profiling, and custom shapes and sizes that make thick-film ceramic heaters so attractive to equipment manufacturers. Providing more heat in smaller areas is easier than with traditional heaters. Additionally, some of the ceramics used are non-contaminating and moisture-proof, making them excellent candidates for clean and ultra-clean applications.

Ceramic thick-film heaters have many advantages over metal or elastomer sheathed heaters beyond just providing a more compact component. They are very fast acting, durable, moisture proof, and contamination proof. They can be designed and machined to virtually any size or shape, watt density, voltage, and distributed wattage profile. While the initial design and prototyping requires investment in time and money, the resulting product can be mass produced economically and with repeatable accuracy and quality.


Custom Vacuum Feedthroughs by BCE
BCE Epoxy Vacuum Feedthroughs

Designer, why conform your designs to a vendor spec, when BCE will adapt to yours?

Sixty years of high-tech design experience in semiconductor equipment, medical equipment and R&D yields one of BCE's most innovative products.

Equipment manufacturers and scientific researchers are continually challenged with supplying power, fiber-optic, control, and monitoring cables into (and out of) sealed vacuum vessels. Whether due to space restrictions, special geometries, or number and type of conductors, standard glass-to-metal or ceramic feedthroughs never quite fit the bill. Unfortunately, because of limited options, many designers are forced to compromise and go for an off-the-shelf solution.

You don't have to compromise anymore.

Epoxy to the rescue. During the past decade, new epoxy compounds have been developed that rival glass and ceramic in performance. BCE is at the forefront of this development and leverages modern epoxy's unique properties to solve your feedthrough challenges.

With modern epoxy feedthroughs, any kind of standard or custom connector is sealed in a completely potted, high-performance, clear epoxy compound. Epoxy seals offer countless design options, and most amazingly, performance equal to or better than glass or ceramic. Better yet, pricing is very competitive and quick turn-around for prototypes and short production runs are not a problem.

BCE custom epoxy vacuum feedthroughs offer the best choice in application flexibility, cost, and high performance. Epoxy feedthroughs are the right product for today’s fast moving markets. If you have to pass an electrical, pneumatic, or fiber-optic signal through a vacuum chamber wall, THINK OF BCE!

The Advantages of Epoxy Feedthroughs Over Glass and Ceramic

  • Custom shapes, angles and conductors no problem.
  • Run wires (and shielding), pneumatic tubing, or fiber-optic cables.
  • Cost effective compared to glass and ceramic.
  • Short runs and prototypes available quickly.
  • Meets NASA specs on outgassing.
  • Clear epoxy allows for visual inspection.
  • Mounting directly to printed circuit boards and flex-circuits.
  • Eliminates voltage drop or contact resistance.
Glasrope Heaters
Glass Rope

Glasrope Heaters: Single and Double

The Hotwatt Single Glasrope Heater has a termination on each end. The nominal diameter is .165" x .032" wall for 120 volts, and .180" x .040" wall for 240 volts. Lengths to 300". Maximum temperature is 900° F.

The Hotwatt Double Glasrope Heater has two terminations on the same end. Nominal diameter is .300". Length to 150". Maximum temperature is 900° F. Made in U.S.A.


Pipes, Tubes, and other similar apparatus where spot or particular locations need to be warmed. Odd shapes such as: Laboratory Beakers, Valves, and Piping, Appliances, Drier Units for Blueprint Machines, Incubators, and Tracers for Pipe Lines.
Backer Hotwatt

BCE Engineering & Quality Assurance

BCE engineers provide decades of experience in design and development, delivering a wealth of empirical data and experience. BCE welcomes your custom requirement and will design and deliver a part that meets your challenging needs.

BCE is recognized for its commitment to quality and excellence by being certified in accordance with ISO 9001:2015.
ISO 9001
BCE Specialized Ceramic Metallization
Ceramic Metallization

Refractory Metallization, Brazing, Contract Firing

BCE has specialized in ceramic metallization since 1988. Their engineers and team combines for decades of experience in the research and development needs of the semiconductor and other high-tech industries. BCE performs precision machining and grinding services on ceramics and quartz. Materials are processed, measured and cleaned with state-of-the-art equipment by highly trained professionals. All parts are designed and fabricated to the customer’s specifications. We perform the following services on ceramics and quartz materials:

Refractory Metallization

Hi-Temp Refractory metallization is the only solution for some packaging applications. Tungsten and Moly-Manganese metallizations have higher adhesion to the substrate than Thick-film metallization. This makes it the ideal process for Hermetic packages, Brazed lead frames and packages requiring high operating temperatures. BCE can screen print, spray or hand-paint these metals onto Alumina Oxide or Beryllium Oxide substrates. These patterns can be plated with Gold and Nickel or Gold alone. Once Gold plated, these surfaces are solderable and wire bondable with Aluminum or Gold wire.


Their batch furnaces are ideal for accurate brazing of small quantities and large. They can braze Kovar, Stainless Steel, Copper and Copper/Tungsten as well as many other metals to metallized ceramic. When the application requires, BCE can step-braze to combine several sub-assemblies into the final product. BCE has experience designing and brazing Pins and Sockets into holes, ring frames, lead frames and heat sinks.

Contract Firing

BCE's furnace capability allows them to offer contract firing. Their controlled atmosphere batch furnaces can be used for large volume soldering, glass sealing, epoxy curing and Nickel and Gold sintering. Their programmable Cold Wall furnaces operate at temperatures up to 1500° C in a reducing atmosphere.
Ceramics Metalization

BCE Engineering & Quality Assurance

BCE engineers provide decades of experience in design and development, delivering a wealth of empirical data and experience. BCE welcomes your custom requirement and will design and deliver a part that meets your challenging needs.

BCE is recognized for its commitment to quality and excellence by being certified in accordance with ISO 9001:2015.
ISO 9001
BCE Engineered Ceramics

Semiconductor | Electronics | Military/Defense | Medical | Aerospace | Other Industries

Providing Consulting, Engineering, Design, Prototyping, and Production of Custom Thick Film Heaters, Ceramic Machining and Grinding Services

BCE Advance Ceramic MachiningBCE's Engineered Ceramics offers custom ceramic heaters and precision ceramic parts. BCE provides years of ceramic expertise in successfully designing and applyng products to many industries, including analytical instrumentation, semiconductor, photovoltaic, medical equipment, plastics processing, foodservice equipment, packaging, aerospace and other industries.

Our expertise allows us to build and create intricate designs within weeks of placing an order. BCE's fast turn-around distinguishes us from the competition.

Industries Served:

  • Semiconductor
  • Electronics
  • Military/Defense
  • Medical
  • Aerospace
  • Other Industries

BCE Ceramic MachiningBCE Ceramics is located in the Bay Area in Northern California, the world center for high-tech development. BCE’s continual goal is to surpass customer expectations through a 100% committed and dedicated team. BCE Team members are some of the most experienced engineers and technicians dealing with advanced ceramics, thick film technology, laser processing, and ceramic machining in the world.

BCE offers project review and consultation to ensure the proper execution of design, prototyping, and manufacturing.  BCE takes great pride in being your full service provider of these advanced technologies.


  • Aluminum Oxide
  • Aluminum Nitride
  • Carbide (CVD, HP, RBSC)
  • Fused Quartz
  • Fused Silica
  • Silicon Nitride (SSN, SRBSN, RBSN)
  • Hi-Purity Glass
  • Ytrria
  • Zirconia (PSZ, TTZ)

BCE MachiningCapabilities:

We perform the following services on ceramics and quartz materials:

  • CNC Machining - Lathe, Mill, Surface, Ultra Sonic
  • Automated Machining - Blanchard, Lathe, Mill, Surface, Universal grinding
  • Manual Machining - Blanchard, Lap/Polish, Lathe, Mill, Surface grinding, Lapping/Polishing
  • Ceramics and Quartz Machining - Rapid prototyping with 1.5-3 week delivery Subcontract Grinding
  • Prototype and Quick Turn NPI and First Article Production Small Run production Medium volume production High volume production
Finished Standard
Flatness (as ground) .0001”/” .001”/”
Flatness (mechanical polish) .000002” - - - - - -
Straightness .0002”/” .001”/'
Circularity .0001”/” .001”/'
Cylindricity .0001”/” .001”/'
Perpindicularity .0001”/” .001”/'
Squareness 0:00.30o 0:30.00o
Angularity 0:00.30o 0:30.00o
Parallelism .00005”/” .0005”/”
Surface Roughness (as ground) - - - - - - 32u”
Surface Roughness (manual polish) 8u” - - - - - -
Surface Roughness (mechanical polish) >2u” - - - - - -

Materials in Stock
  • Aluminum Oxide  (Al203, AD 96, 995 or 998)
  • Zirconia (PSZ, TTZ)
  • Fused Quartz (Transparent or Opaque)
  • Aluminum Nitride (AIN)
  • Silicon Nitride (SSN, RBSN, HPSN)
  • Macor® Machinable Glass Ceramic
Materials BCE Ceramics has worked with:
  • Boron Carbide
  • Single Crystal Silicon
  • Sapphire
  • Graphite (Poco graphite)
  • Mullite
  • Silicon Carbide (CVD, HP, RBSC)
Secondary services:
  • Lapping/Polishing
  • Chemical Cleaning for clean room use
  • Quartz Welding
  • Fire Polish and Annealing
  • Clean Room Packaging
  • Laser marking
  • Inspection
  • Texturizing (media blast)


Custom Ceramic Thick Film Heaters and Ceramic Machining: Below are thumbnails of custom development work BCE provided to customers in high-tech industries. Click on a thumbnail to see a larger view.
21060 Corsair Blvd. Hayward, CA 94545 | (510) 274-1990
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