5/31/2023 0 Comments Minco heater![]() ![]() Profiling adds extra heat at loss points to improve the uniformity of the temperature across the heater. Heat patterns can be uniform or custom profiled for the specific application. Options include integral temperature sensors and flex-circuit interconnects. Heaters may be clamped to heat sinks or factory bonded with polyimide adhesives for complete thermal subassemblies. Applications include semiconductor processing and test, avionics, packaging equipment, and graphics processors. They stand up to most processing and cleaning chemicals, making them an excellent choice for ultra-pure processes. The result is higher throughput in many thermal processes.ĪP heaters are suitable for vacuum use with outgassing less than 0.01% collected volatile condensable material. The new construction, called "AP", allows 50% more power- 80 watts per square inch (13 watts per square centimeter)for faster warm-up and rapid response to changing heat loads. combine Kapton insulation with polyimide adhesive to achieve a temperature rating of 250☌ (482☏)- 50☌ higher than previously possible with Kapton heaters and 15☌ higher than silicone rubber heaters. But as compact, accurate, and reliable options, they are well worth consideration in virtually any heating application.New Thermofoil heaters from Minco Products, Inc. Each entails custom design based on the requirements of the application. Platinum wire-wound RTDs are the most expensive option but have the widest temperature range.Īny of these options will work with a wide variety of controllers, but all of them provide an economical alternative to the assembly of separate sensors in a heating application. Wire-wound sensors have a wider effective temperature range than thermistors but cost more. These would sit above the heater surface and, depending on design requirements, might need potting for protection and be slower in response to temperature change due to the insulation. Where budget is a key issue, a surface-mounted chip or thermistor can be configured at very low cost. Glass-bead thermistors are more rugged and more costly. ![]() An embedded epoxy-coated thermistor would be an inexpensive solution for less demanding applications. Thermistors are relatively inexpensive but only operate within a limited temperature range. The choice of sensors depends on the expected temperature range, the desired toughness of the assembly, and budget. It would have four exposed leads, two for power and two for connection to the controller. The entire assembly would then be covered with a polyimide sheet and autoclaved to produce an assembly approximately the size of the heater alone. Each generates a changing resistance that varies relative to temperature, sending a signal to the controller, which turns the heater on or off to maintain the desired temperature.Ī typical integrated assembly would be an etched foil heater with a pocket left in which the embedded sensor is installed. ![]() These include thermistors, wire-wound copper, platinum, or nickel-iron sensors, and chip-based platinum RTD sensors. The majority of heaters with integrated sensors are etched foil, and there are several types of sensors that can be integrated into such a device. And while it may entail custom design and somewhat increase the cost of the heater/sensor assembly, it almost always reduces total cost of ownership and support. It places the sensor as close as possible to the heater for accurate temperature measurement and swift response to thermal change. It creates a more robust assembly for use in physically demanding military, aerospace, or industrial applications. It reduces the size of the finished assembly and eliminates a set of connecting wires that could be a point of failure. First, this eliminates a step in assembly of the finished product. That said, there are a number of good reasons to integrate the sensor with the heater instead of keeping the sensor as a separate component. Typically, that process entails a controller and a sensor connected to the heater to create a feedback loop. In most heating applications, the heating itself would be pointless without some kind of control. ![]()
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