Pulse Synchronization of Excimer Laser High-Voltage Power Supply in Laser Annealing and Etching Equipment
Pulse synchronization of an excimer laser supply in laser annealing and etching equipment aligns the discharge with the laser trigger. The pulse energy depends on the charging voltage, the timing depends on the synchronization, and the process result verifies the alignment.
The charging voltage precision defines the pulse energy. The voltage is calibrated, the charging loop holds the set point, and the pulse-to-pulse energy variation is measured.
The discharge timing follows the trigger. The delay is calibrated, the jitter is controlled, and the laser output timing is repeatable.
The energy feedback corrects the pulse deviation. The measured energy is compared with the target, the correction is applied per pulse, and the accumulated drift is bounded.
The repetition rate matches the process speed. The charging power supports the rate, the pulse sequence is continuous, and the process throughput is maintained.
The protection covers the discharge faults. The overcurrent and the overvoltage are handled by the fast path, the discharge chamber is protected, and the recovery follows the duty cycle.
Process verification uses the annealing or the etching result. The treated area is measured, the data is compared with the target, and the synchronization is adjusted from the result.
Field maintenance focuses on the charge and the discharge circuit. The capacitor and the switch condition are checked, the waveform is monitored, and the maintenance follows the trend data.
The ripple and the dynamic performance are a trade-off. The stronger filter reduces the ripple, the limited loop bandwidth slows the response, and the setting follows the application priority.
The protection threshold is set from the operating condition. The overvoltage threshold sits above the highest running voltage, the overcurrent threshold sits below the dangerous current, and the delay avoids the normal transient.
The insulation material is selected for the voltage and the temperature. The dielectric strength carries the margin, the thermal class matches the operating temperature, and the aging data supports the life assessment.
The control loop stability is verified by the phase margin. The compensation is set at the crossover frequency, the step response shows no oscillation, and the recovery time meets the load change requirement.
The high-voltage terminal design controls the discharge risk. The electrode chamfer reduces the field concentration, the insulation distance follows the withstand calculation, and the partial discharge test verifies the structure.
The efficiency depends on the topology and the device loss. The soft switching reduces the switching loss, the magnetic design optimizes the copper and the core loss, and the efficiency is measured at several load points.
The high-voltage switching sequence follows the safety order. The shutdown comes before the discharge, the discharge completion is confirmed, and the maintenance is permitted only after the confirmation.
The temperature sampling covers the critical device positions. The sensor layout follows the thermal analysis, the channels are calibrated, and the derating control uses the temperature data.
The galvanic isolation serves the insulation and the signal transfer. The optical isolation converts the low-voltage signal, the withstand voltage meets the standard, and the isolation performance is verified periodically.
The digital control keeps the hardware safety baseline. The hardware protection is independent of the software, the fast shutdown does not depend on the program state, and the abnormal path is verified.
The startup check covers the grounding and the interlock state. The ground resistance is confirmed, the interlock loop is tested, and the discharge path is verified before the power-up.
The ripple measurement excludes the external interference. The probe is grounded locally, the shield is complete, the bandwidth matches the indicator, and the repeated measurement is averaged.
The load characteristic affects the regulation. The capacitive load concerns the establishment time, the resistive load concerns the ripple, the pulsed load concerns the dynamic drop, and the field verification adjusts the setting.
The module temperature and the output capability are linked. The derating reduces the output at the high temperature, the derating curve follows the test result, and the rated operation returns after the condition recovers.
The field fault handling follows the symptom classification. The no-output case checks the supply and the protection, the output anomaly checks the feedback and the filter, and the insulation anomaly checks the environment and the aging.
The calibration is executed on the fixed schedule. The voltage and the current channels are calibrated point by point, the reference certificate is valid, and the deviation is corrected and re-verified.
The power-up self-test covers the critical paths. The sampling channel is verified, the protection logic is tested, the communication handshake is confirmed, and the abnormal item blocks the start.
The cable movement affects the measurement stability. The movement changes the distributed capacitance, the sampling chain receives the interference, and the fixed routing restores the repeatability.
The ambient temperature change causes the output drift. The compensation curve is generated from the measured data, the compensation covers the operating range, and the residual drift stays within the limit.
The high-voltage discharge test verifies the insulation margin. The test voltage rises by the standard step, the discharge level is monitored, and the breakdown point is located for the analysis.
The modular structure eases the maintenance. The faulty module is diagnosed independently, the spare stock follows the usage, and the replacement procedure is standardized.
The remote monitoring centralizes the management. The communication uses the unified protocol, the status data is uploaded in real time, and the alarm event is pushed with the record.
The inrush limiting protects the power-up. The limiting resistor and the relay cooperate, the inrush is measured, and the repeated start test verifies the repeatability.
The long-run attention is on the parameter drift. The output trend is recorded, the drift beyond the limit alarms, the aging is predicted, and the maintenance plan follows the data.
The field interference is located by the path analysis. The source is identified, the coupling path is analyzed, the shielding and the grounding are corrected, and the retest verifies the result.
The factory test covers the full performance. The voltage accuracy, the ripple and the response are verified item by item, the data is archived, and the nonconforming item is corrected.
The insulation aging is affected by the temperature and the humidity. The environment is controlled, the insulation state is checked periodically, and the partial discharge trend provides the warning.
