Patent ID: 11937377
Assignee: SHENNAN CIRCUITS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A circuit board preparation method, comprising:
obtaining a to-be-processed plate; wherein the to-be-processed plate comprises an insulating layer, a first copper layer arranged on a first surface of the insulating layer, a second copper layer arranged on a second surface of the insulating layer and opposite to the first copper layer, a blind metalized hole, and a first tab arranged on the first surface and facing the blind metalized hole;
obtaining a white insulating material; laminating the white insulating material to a surface of the insulating layer, a surface of the first copper layer, a surface of the first tab, and a surface of the second copper layer to form a first white insulating medium layer on a surface of the to-be-processed plate and a second white insulating medium layer on another surface of the to-be-processed plate opposite to the first while insulating medium layer;
performing surface polishing for the first white insulating medium layer and grinding the first white insulating medium layer until the first tab is exposed to form a first white reflective layer;
etching the first tab to define a groove with a set depth at a set position on the first tab; and
soldering to a component and/or a chip through the groove with the set depth.