| 摘要 |
<p>PURPOSE:To enable high speed marking by facilitating visual discrimination by a method wherein an alumina ceramic substrate is provided thereon with a printed resistor for laser marking to distinguish non-defectives from defectives after trimming and printed electrodes. CONSTITUTION:The substrate 11 is provided thereon with the resistor 13 for laser marking to distinguish non-defectives from defectives after trimming, and with the electrodes 14 and 15 connected to both ends of the resistor 13. The electrodes 14 and 15 are partly formed to the side end surfaces of the substrate 11. The marking in the substrate 11 is carried out by cutting the resistor with a laser beam on the basis of the signal of discrimination of the non-defectives from the defectives after trimming. Thereby, visual discrimination is enabled, and then high speed cutting is performed.</p> |
