Showing papers on "Microheater published in 1988"
Patent•
05 Jan 1988
TL;DR: In this paper, a PTC thermistor and a microheater are unified into a plate form and the plane of this plate substance is set in parallel to the air blowing direction to reduce the electric power applied to the microheaters.
Abstract: PURPOSE:To ensure the variable control of air temperature in a wide range via a variable resistor by unifying a PTC thermistor and a microheater into a plate form and setting the plane of this plate substance in parallel to the air blowing direction to reduce the electric power applied to the microheater. CONSTITUTION:A temperature sensor element 10 contains a PTC thermistor 10a and a microheater 10b unified together is set on a heater base board 11 supporting a heater 7. The heater 10b and the thermistor 10a are set in parallel to the air blowing direction and the area of the thermistor 10q is smaller than that of the heater 10b. Thus the heat conductivity is improved for both heater 10b and thermistor 10a. Then the stable control is secured with the air temperature is secured at a set level by control the microheater power with a variable resistor 9. At the same time, the set temperature can be changed in a wide range.
6 citations
Patent•
02 May 1988
TL;DR: In this paper, a microheater is used to fuse a seed crystal to a polycrystal material while keeping the purity of the seed crystal by heating and melting the joint.
Abstract: PURPOSE:To surely bond a seed crystal to raw polycrystal material while keeping the purity of the seed crystal by heating and melting the joint between the seed crystal and the raw polycrystal material in a specified atmosphere to integrate both materials. CONSTITUTION:The seed crystal 1 and the raw polycrystal material 2 are charged in a quartz ampule 2 supported by a holder 4 wherein a volatile component material 5 is arranged at the lower part, and a microheater 14 is arranged around the joint between the seed crystal 1 and the raw material 2. A heater 10 is then energized to heat the component 5, the inside of the ampule 2 is kept at the equilibrium vapor pressure of the component 5, the seed crystal 1 is heated by a heater 17, and the raw material 2 is heated by a heater 12 to a temp. below the m.p. The microheater 14 is subsequently energized to heat the joint between the seed crystal 1 and the raw material 2 to a temp. above the m.p., the integration of both materials is confirmed by an endoscope 18, and the temp. of the microheater 14 is gradually lowered.