Abstract:
A microwave processing apparatus includes a processing chamber which accommodates an object to be processed, and a microwave introducing unit which has at least one microwave source to generate a microwave used to process the object and introduces the microwave into the processing chamber. The microwave processing apparatus further includes a control unit which controls the microwave introducing unit. Furthermore, the control unit changes a frequency of the microwave during a state of processing the object.
Abstract:
A microwave processing apparatus includes a processing chamber which accommodates an object; a microwave introducing unit for generating microwaves used to process the object and introducing the microwaves into the processing chamber; and a control unit for controlling the microwave introducing unit. The microwave introducing unit includes microwave sources to generate the microwaves and introduces parts of the microwaves into the processing chamber simultaneously, and the control unit controls the microwave sources such that arbitrary combinations of the microwave sources alternately repeat a simultaneous microwave generating state and a microwave non-generating state during a state of processing the object.
Abstract:
A controller 90 of an automatic matching unit includes a first and a second matching control unit 100, 102 for respectively variably controlling the electrostatic capacitances of a first and a second variable capacitors 80, 82 through a first and a second stepping motor 86, 88 such that a measured absolute value ZMm and a measured phase Zθm of a load impedance obtained by an impedance measuring unit 84 become close to a predetermined reference absolute value ZMs and a predetermined reference phase Zθs, respectively; and a gain control unit 112. The gain control unit 112 variably controls a proportional gain of at lease one of the first and the second matching unit based on current electrostatic capacitances NC1 and NC2 of the first and the second variable capacitors 80, 82 obtained by a first and a second electrostatic capacitance monitoring unit 108, 110, respectively.
Abstract:
In an automatic matching unit, a controller includes a first and a second matching algorithm. The operating point Zp is moved stepwise toward the matching point Zs with a relatively large pitch by using the first matching algorithm. Further, when the operating point Zp is within the outer proximity range, the operating point Zp is moved stepwise toward the matching point Zs with a relatively small pitch by using the second matching algorithm. In the second matching algorithm, the operating point Zp is moved close to the third reference line TC1S or TC2S perpendicular to the first or second reference line C1S or C2S along, e.g., the route Zp(7)->Zp(8)->Zp(9) on the impedance coordinates. The coordinates of the operating point Zp(9) reaches an available quasi-matching point ZB extremely close to the origin O (the matching point Zs).