Patent ID: 9596769
Date: 2017-03-14
CPC Classifications: H05K

Claim:
1. A multilayer circuit board, comprising: a first substrate provided with a first pad, a second pad, two plated through holes, and a first sub-circuit, wherein the two plated through holes are electrically connected to the first pad and the second pad respectively; the first pad and the second pad are electrically connected to the first sub-circuit through the two plated through holes, and are provided on a top surface of the first substrate; and a second substrate having a top surface, a bottom surface, a lateral edge, and an opening, wherein the bottom surface of the second substrate is attached to the top surface of the first substrate; the opening extends from the top surface to the bottom surface of the second substrate, and the first pad of the first substrate is in the opening of the second substrate; the second pad of the first substrate is beside the lateral edge of the second substrate, and is not covered by the second substrate; the second substrate further provided with a pad on the top surface and a second sub-circuit electrically connected to the pad of the second substrate; another second substrate attached to the top surface of the second substrate, wherein the another second substrate has an opening and a lateral edge; the opening of the another second substrate is communicated with the opening of the second substrate; the second substrate further is provided with another pad on the top surface thereof and two plated through holes electrically connected to the pad and the another pad of the second substrate respectively; the another second substrate is provided with another opening; and the another pad of the second substrate is in the another opening of the another second substrate, wherein the pad and the another pad of the second substrate are electrically connected to the second sub-circuit through the two plated through holes of the second substrate; wherein the another second substrate is further provided with two pads, two plated through holes electrically connected to the two pads respectively, and another second sub-circuit electrically connected to the two pads through the two plated through holes; wherein the two plated through holes in one substrate among the first substrate, the second substrate, and the another second substrate are not extended to another substrate among the first substrate the second substrate and the another second substrate.