HK 300mm Compressed Heater Chuck
BACKGROUND
To reduce the overall cost for an existing application, BCE developed a 300mm aluminum heater chuck that is un-brazed utilizing the compression of two plates with countersink set screws. The heater surface specs were 0.003” flatness at a 0.005” parallelism. Using a 208-volt power supply at 9.7ohm, start @ 25°C temperature and ramped from 100°C to 465°C in 23 minutes.
SCOPE
Aluminum Heater Chuck needed to satisfy the following:
- Achieve temperature up to 435°C @ +/- 2% or better
- Internal element must be able to withstand temperatures up to 600°C
- Anodized surface for electrical isolation
- 208 Volt, 9.7 Ohm, 4,460 Watt (+5% / - 10%)
- Thermocouple bore hole to be placed at the center (variable)
- 4 point temperature profile on the top surface of the heater
- Used an infrared sensor for each 4 point locations
- FINISH: Hard coat anodize per MIL-A-8625F, Type 3 Class1 Hard-coat thickness
OUTCOME
BCE produced a highly effective high 300mm heater with exceptional uniformity better than the proposed 435°C (+/-2%). After the initial ramp, the heater maintained 435°C (+/- 1%) as per the chart below (Temp profile #5).
BCE
510-274-1990
Molybdenum-Copper Stage Heater
BACKGROUND
A research and development company approached BCE wanting to heat a 1mm x 1mm x 0.5mm thick component. This was a very sensitive part that needed to be tested to a maximum exposure of 200°C continuous with very precise temperature uniformity for sampling purposes.
SCOPE
Molybdenum-Copper Stage Heater needed to satisfy the following:
- Temperature <201°C
- Internal element must be able to withstand temperature <210°C
- A cold section was not needed
- Molybdenum-Copper (Moly-Copper) base 65% Moly and 35% Copper
- 12Volt, 3Watt (Max)
- Two thermocouple type “K” external
- M1 threads
OUTCOME
BCE produced a highly effective assembly which reached the temperature of 200°C in under 1-Minute utilizing only 2.6 watts. Because of the low mass and high conductivity of the copper-moly base, reaching the target temperature and cooling down was highly efficient.
There were two thermocouples which were used to verify the test temperature. One was an exposed bare-bead TC 36 AWG, with the second TC being a 0.062ӯ probe style unit. The M1 threads were challenging, however our process was able to make this happen.
GET MORE INFORMATION ABOUT THE CUSTOM MOLYBDENUM-COPPER HEATER HERE
Call BCE today for more information.
510-274-1990
https://bcemfg.com
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