摘要:
A power converting apparatus includes a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; a reactor; and a charging and discharging circuit connected between the rectified voltage output terminals. The charging and discharging circuit includes a first condenser connected with one of the rectified voltage output terminals and one of the AC power input terminals; and a second condenser connected with the other of the rectified voltage output terminals and the one AC power input terminal. The reactor generates a resonance current together with the first condenser and the second condenser, and the second condenser discharges to zero voltage while the first condenser is charged.
摘要:
A power converting apparatus includes a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; a reactor; and a charging and discharging circuit connected between the rectified voltage output terminals. The charging and discharging circuit includes a first condenser connected with one of the rectified voltage output terminals and one of the AC power input terminals; and a second condenser connected with the other of the rectified voltage output terminals and the one AC power input terminal. The reactor generates a resonance current together with the first condenser and the second condenser, and the second condenser discharges to zero voltage while the first condenser is charged.
摘要:
A power converting apparatus includes a rectifying circuit having a pair of AC power input terminals and a pair of rectified voltage output terminals; a reactor; and a charging and discharging circuit connected between the rectified voltage output terminals. The charging and discharging circuit includes a first condenser connected with one of the rectified voltage output terminals and one of the AC power input terminals; and a second condenser connected with the other of the rectified voltage output terminals and the one AC power input terminal. The reactor generates a resonance current together with the first condenser and the second condenser, and the second condenser discharges to zero voltage while the first condenser is charged.
摘要:
A method and system of holding a substrate where foreign substances on the back surface can be decreased. The substrate holding system comprises a ring-shaped leakage-proof surface having a smooth surface on the specimen table corresponding to the periphery of the substrate, a plurality of contact holding portions within the periphery of the substrate, and electrostatic attraction means for fixing the substrate by contacting the back surface of the substrate to the ring-shaped leakage-proof surface and the contact holding portions. The substrate contacts to the cooling surface at the ring-shaped leakage-proof surface and the contact holding portion placed on a position inside the ring-shaped leakage-proof surface. The back surface of the substrate and the cooling surface do not contact to each other in the large portion of the remaining area.
摘要:
A switching power converter capable of operation in either Nonconversion, Stepdown, or Stepup Mode. Included is a parallel circuit of three serial connections of a first, a second and a third pair of switches. The junction between the first pair of switches is connected to an a.c. input terminal via an inductor, the junction between the second switch pair grounded, and the junction between the third switch pair connected to an a.c. output terminal via another inductor. The first and third switch pairs are driven at the frequency (e.g. 50 Hz) of an a.c. input voltage, and the second switch pair at a higher frequency (e.g. 20 kHz), in Nonconversion Mode; the first switch pair at the low frequency, and the second and third switch pairs at the high frequency, in Stepdown Mode; and the first and second switch pairs at the high frequency, and the third switch pair at low frequency, in Stepup Mode. The second switch pair is invariably driven at the high frequency.
摘要:
A method and system of holding a substrate to decrease foreign substances on the back surface thereof. The substrate holding system includes a ring-shaped leakage-proof surface having a smooth surface on the specimen table corresponding to the periphery of the substrate, contact holding portions within the periphery of the substrate, and electrostatic attraction means for fixing the substrate by contacting the back surface thereof to the ring-shaped leakage-proof surface and the contact holding portions. The substrate contacts a cooling surface at the ring-shaped leakage-proof surface and the contact holding portion placed on a position inside the ring-shaped leakage-proof surface. The back surface of the substrate and the cooling surface do not contact each other in the large portion of the remaining area.
摘要:
A method and system of holding a substrate where foreign substances on the back surface can be decreased. The substrate holding system comprises a ring-shaped leakage-proof surface having a smooth surface on the specimen table corresponding to the periphery of the substrate, a plurality of contact holding portions within the periphery of the substrate, and electrostatic attraction means for fixing the substrate by contacting the back surface of the substrate to the ring-shaped leakage-proof surface and the contact holding portions. The substrate contacts to the cooling surface at the ring-shaped leakage-proof surface and the contact holding portion placed on a position inside the ring-shaped leakage-proof surface. The back surface of the substrate and the cooling surface do not contact to each other in the large portion of the remaining area.
摘要:
A method and system of holding a substrate where foreign substances on the back surface can be decreased. The substrate holding system comprises a ring-shaped leakage-proof surface having a smooth surface on the specimen table corresponding to the periphery of the substrate, a plurality of contact holding portions within the periphery of the substrate, and electrostatic attraction means for fixing the substrate by contacting the back surface of the substrate to the ring-shaped leakage-proof surface and the contact holding portions. The substrate contacts to the cooling surface at the ring-shaped leakage-proof surface and the contact holding portion placed on a position inside the ring-shaped leakage-proof surface. The back surface of the substrate and the cooling surface do not contact to each other in the large portion of the remaining area.
摘要:
In a method of holding a substrate and a substrate holding system, the amount of foreign substances on the back surface of the substrate can be decreased, and only a small amount of foreign substances transferred from a mounting table to the substrate. For this purpose, the substrate holding system has a ring-shaped leakage-proof surface providing a smooth support surface on the specimen table corresponding to the periphery of the substrate, a plurality of contact holding portions which bear against the substrate on the specimen table between the corresponding position to the periphery of the substrate and the corresponding position to the center of the substrate, and electrostatic attraction means for fixing the substrate by contacting the back surface of the substrate to the ring-shaped leakage-proof surface and the contact holding portions. The substrate is exposed to a cooling surface at the ring-shaped leakage-proof surface and the contact holding portion placed at a position inside the ring-shaped leakage-proof surface. The back surface of the substrate and the cooling surface do not contact each other in the large portion of the remaining area.
摘要:
Present invention provides a method of holding substrate and a substrate holding system where the amount of foreign substances on the back surface can be decreased, and a little amount of foreign substances may be transferred from a mounting table to a substrate. The substrate holding system comprises a ring-shaped leakage-proof surface having smooth surface on the specimen table corresponding to the periphery of the substrate, a plurality of contact holding portions against the substrate on the specimen table between the corresponding position to the periphery of the substrate and the corresponding position to the center of the substrate, and electrostatic ttraction means for fixing the substrate by contacting the back surface of the substrate to the ring-shaped leakage-proof surface and the contact holding portions. The substrate contacts to the cooling surface at the ring-shaped leakage-proof surface and the contact holding portion placed on a position inside the ring-shaped leakage-proof surface. The back surface of the substrate and the cooling surface do not contact to each other in the large portion of the remaining area.