| 摘要 |
A tool cutting method which includes a correlation table preparing step of preparing a correlation table indicating the correlation between the brightness of light emitted from LED chips and the thickness of a sealing member, a brightness measuring step of measuring the brightness of light emitted from the LED chips by applying a voltage to the LED chips, a calculating step of calculating the thickness of the sealing member corresponding to the desired thickness from the brightness measured in the brightness measuring step and the correlation table, and a cutting step of cutting the sealing member by using a tool cutting unit after performing the calculating step to reduce the thickness of the sealing member to a finished thickness providing the desired brightness of light emitted from the LED chips.
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