Patent ID: 11929551
Assignee: POWER WAVE ELECTRONIC CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of manufacturing a chip antenna, the method comprising steps of:
(a) preparing a substrate with a front surface and a back surface, a metal layer on both the front surface and the back surface,
(b) drilling a plurality of rows of external through holes arranged longitudinally on the substrate at predetermined positions for making chip antennas, and every two of internal through holes arranged longitudinally between every two of the external through holes arranged longitudinally, wherein a predetermined distance is between every two of the internal through holes arranged longitudinally,
(c) forming fishing grooves at the predetermined distance between every two of the internal through holes arranged longitudinally,
(d) electroplating a metal material on the metal layer of the front surface and the back surface of the substrate, and on walls of the external through holes and the internal through holes, to form a conductive layer,
(e) performing at least one of exposure, development, and etching techniques to form a circuit layer electrically connected to the metal layer on the front surface and the back surface of the substrate, and connected to the external through holes and the internal through holes, the circuit layer comprising a first side circuit layer, a second side circuit layer, and an internal circuit layer between the first side circuit layer and the second side circuit layer,
(f) printing black ink on the front surface and the back surface of the substrate after the circuit layer is finished, the black ink covering the internal circuit layer between the first side circuit layer and the second side circuit layer to form a solder mask, wherein only the internal through holes and parts of the internal circuit layer are exposed by the solder mask,
(g) printing white ink on the front surface of the substrate exposed between the solder mask and an external circuit after the solder mask finished, to form a recognition pattern layer for recognizing directions or part numbers,
(h) electroplating a metal material on the front surface of the substrate, walls of the internal through holes exposed on the back surface of the substrate, a short line of the parts of internal circuit layer exposed on the back surface of the substrate, the first side circuit layer exposed on the back surface of the substrate, the walls of the external through holes exposed on the back surface of the substrate, and the second side circuit layer exposed on the back surface of the substrate, and to form an electrode layer, and
(i) cutting a longitudinal cutting line and a horizontal cutting line on the substrate after the electrode layer formed, and to form a chip antenna; the longitudinal cutting line aligned with the external through holes arranged longitudinally, the horizontal cutting line aligned with a gap between the internal through holes arranged horizontally up and down.