Patent ID: 11860545
Assignee: nan
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. An exposure method, comprising the steps of:
(a) emitting a laser to a first spatial light modulator which includes a plurality of first pixels;
(b) using the first spatial light modulator to change the phase of the laser modulated by each of the first pixels;
(c) using the first spatial light modulator to irradiate the laser onto a second spatial light modulator after the phase of the laser is modulated, wherein the second spatial light modulator comprises a plurality of second pixels;
(d) using the second spatial light modulator to change the amplitude of the laser modulated by the second pixel;
(e) projecting the laser to a photoresist layer to form an exposure pattern after the second spatial light modulator modulates the amplitude, wherein the exposure pattern comprises a plurality of third pixels; and
(f) detecting the phase and light intensity of the laser coming from the second spatial light modulator;
wherein, the Step (f) and Step (e) are performed synchronously;
wherein, the first pixel, the second pixel and the third pixel correspond with one another:
wherein the Step (f) further comprises the steps of:
(f1) dividing the laser into a first laser and a second laser by a beam splitter;
(f2) projecting the second laser towards a light intensity sensor and a phase sensor;
(f3) using the light intensity sensor to detect the light intensity of the second laser;
(f4) using the phase sensor to detect the phase of the second laser; and
(f5) controlling the first light modulator and the second light modulator according to the phase and light intensity of the second laser.