Circuit board and manufacturing method
First Claim
1. A circuit board comprising at least two circuit board units, each of the circuit board units comprising:
- a baseboard having a conductive hole filled with an electrical conductor;
a cover layer arranged on the baseboard and defined at least one trench and at least one opening, wherein the at least one opening exposing out the electrical conductor; and
a circuit pattern embedded in the at least one trench and comprising a connecting portion, wherein the connecting portion is embedded in the opening and is electrically coupled to the electrical conductor; and
the at least two circuit board units are stacked, two sides of the at least one cover layer are respectively adhered to the corresponding baseboard, and two ends of the at least one connecting portion are respectively electrically coupled to the corresponding electrical conductor and electrically coupled the two adjacent circuit patterns.
1 Assignment
0 Petitions
Accused Products
Abstract
A circuit board includes at least two circuit board units. Each of the circuit board units includes a baseboard having a conductive hole filled with an electrical conductor, and a cover layer arranged on the baseboard and defining at least one trench and at least one opening. The at least one opening exposes out the electrical conductor. A circuit pattern is embedded in the at least one trench and includes a connecting portion. The connecting portion is embedded in the opening and is electrically coupled to the electrical conductor. The at least two circuit board units are stacked. Two sides of the at least one cover layer are respectively adhered to the corresponding baseboard. Two ends of the at least one connecting portion are respectively electrically coupled to the corresponding electrical conductor and electrically coupled the two adjacent circuit patterns.
4 Citations
9 Claims
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1. A circuit board comprising at least two circuit board units, each of the circuit board units comprising:
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a baseboard having a conductive hole filled with an electrical conductor; a cover layer arranged on the baseboard and defined at least one trench and at least one opening, wherein the at least one opening exposing out the electrical conductor; and a circuit pattern embedded in the at least one trench and comprising a connecting portion, wherein the connecting portion is embedded in the opening and is electrically coupled to the electrical conductor; and the at least two circuit board units are stacked, two sides of the at least one cover layer are respectively adhered to the corresponding baseboard, and two ends of the at least one connecting portion are respectively electrically coupled to the corresponding electrical conductor and electrically coupled the two adjacent circuit patterns. - View Dependent Claims (2, 3)
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4. A method of manufacturing a circuit board comprising a plurality of circuit board units, the method comprising:
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providing a baseboard and defining at least one through hole in the baseboard; filling the at least one through hole with an electrical conductor; covering a side of the baseboard with a cover layer, wherein the cover layer containing a laser direct structuring additive; adhering a separation film to a side of the cover layer opposite to the baseboard; defining at least one trench and at least one opening by laser ablation, wherein the at least one opening penetrating the separation film and the cover layer exposing out the electrical conductor; forming a conductive circuit pattern in the at least one trench and forming a connecting portion in the at least one opening to obtain one circuit board unit; making at least one more of the circuit board unit; and laminating at least two of the circuit board units to obtain the circuit board. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification