Thin film battery substrate cutting and fabrication process
First Claim
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1. A method of fabricating a battery on a battery substrate, the method comprising:
- (a) selecting a battery substrate having cleavage planes;
(b) applying a plurality of pulsed laser bursts of a pulsed laser beam to the battery substrate, the pulsed laser bursts having sufficient power and duration to cut through the battery substrate substantially without causing fractures along the cleavage planes of the battery substrate; and
(c) before or after (b), depositing a plurality of battery component films on the battery substrate, the battery component films comprising at least a pair of electrodes about an electrolyte that cooperate to form a battery cell.
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Abstract
A method of fabricating a battery comprises selecting a battery substrate having cleavage planes, and cutting the battery substrate with pulsed laser bursts from a pulsed laser beam to control or limit fracture along the cleavage planes. The pulsed laser beam was also found to work well on thin substrates which are sized less than 100 microns. Before or after the cutting step, a plurality of battery component films can be deposited on the battery substrate. The battery component films include at least a pair of electrodes about an electrolyte which cooperate to form a battery.
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Citations
20 Claims
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1. A method of fabricating a battery on a battery substrate, the method comprising:
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(a) selecting a battery substrate having cleavage planes; (b) applying a plurality of pulsed laser bursts of a pulsed laser beam to the battery substrate, the pulsed laser bursts having sufficient power and duration to cut through the battery substrate substantially without causing fractures along the cleavage planes of the battery substrate; and (c) before or after (b), depositing a plurality of battery component films on the battery substrate, the battery component films comprising at least a pair of electrodes about an electrolyte that cooperate to form a battery cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of fabricating a battery on a battery substrate, the method comprising:
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(a) selecting a battery substrate having cleavage planes; (b) applying to the battery substrate, a plurality of pulsed laser bursts of a pulsed laser beam comprising an ultraviolet laser beam having a power level of from about 5 to about 80 microjoules, the pulsed laser bursts having sufficient power and duration to cut through the battery substrate substantially without causing fractures along the cleavage planes of the battery substrate; and (c) before or after (b), depositing a plurality of battery component films on the battery substrate, the battery component films comprising at least a pair of electrodes about an electrolyte that cooperate to form a battery cell. - View Dependent Claims (13, 14, 15)
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16. A method of fabricating a battery on a battery substrate, the method comprising:
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(a) selecting a battery substrate having cleavage planes; (b) cutting the battery substrate by applying a plurality of pulsed laser bursts having a fluence of from about 10 to about 800 J/cm2; and (c) before or after (b), depositing a plurality of battery component films on the battery substrate, the battery component films comprising at least a pair of electrodes about an electrolyte that cooperate to form a battery cell. - View Dependent Claims (17, 18, 19, 20)
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Specification