Solder mask configuration for a printed circuit board of a modular jack
AssigneeHon Hai Precision Ind. Co., Ltd.
InventorsZhenghua Xu, Houg Jun Wang, Qisheng Zheng
Life of this patent
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Abstract
A printed circuit board (23) used in a modular jack (1) includes a plurality of insertion holes (231, 232) defined through an upper side and a lower side thereof. A conductive layer coating (235) coats an inside of each insertion hole and a conductive base ring (236) forms a rim around each end of each hole. A solder mask (230) covers portions of a front and a rear surfaces of the printed circuit board around the insertion holes. The solder mask covers over the base rings and extends a short distance into each insertion hole, thereby increasing a creepage distance between conductive layer coatings of adjacent holes. This protects the printed circuit board from short circuiting.
Claims13
A modular jack for mating with a complementary connector comprising:
- an insulating housing defining a first receiving hole at a front thereof for receiving a complementary connector and a second receiving hole at a rear;
- a first terminal insert received in the second receiving hole, the first terminal insert having a plurality of terminals embedded therein, each terminal comprising an inclined contacting end extending into the first receiving hole, and a backwardly extending press-fitted end extending into the second receiving hole;
- a printed circuit board received in the second receiving hole and defining a plurality of insertion holes therethrough, each insertion hole having a conductive layer coating on an inner surface thereof, the printed circuit board comprising a solder mask covering a portion of at least a surface thereof around the insertion holes, and extending radially into each insertion hole a tiny distance to increase a creepage distance between conductive layer coatings of adjacent insertion holes, the press-fitted ends of the terminals being press-fitted in corresponding insertion holes;
- and
- a second terminal insert received in the second receiving hole of the insulating housing, the second terminal insert having a plurality of conductive pins embedded therein, each conductive pin comprising a downwardly extending soldering portion and a forwardly extending press-fitted portion engaging with a corresponding insertion hole.
A printed circuit board comprising:
- a substrate defining opposite upper and lower surfaces thereon;
- one terminal insertion hole extending through said substrate in a vertical direction;
- one conductive cylindrical layer applied on an inner surface of said terminal insertion hole, said layer further including a pair of sections located at two opposite ends thereof and horizontally extending and lying on the upper and lower surfaces, respectively;
- and
- solder masks applied upon said upper and lower surfaces and covering at least said pair of structures in said vertical direction.
A method of preventing arcing between two adjacent terminal insertion holes in a print circuit board, comprising:
- providing the printed circuit board with two opposite surfaces and at least two adjacent terminal insertion holes extending through said printed circuit board and said surfaces in a vertical direction;
- coating a conductive layer on an inner surface of each of said terminal insertion holes with horizontally lying ring-like structures on two opposite ends of said conductive layer adjacent said surfaces, respectively;
- and
- forming solder masks on the surfaces covering the corresponding ring-like structures for preventing arcing between the two ring-like structures, on the same surface, of said two adjacent terminal insertion holes, respectively.
A printed circuit board comprising a substrate having thereon opposite surfaces with a plurality of terminal insertion holes extending therethrough in a vertical direction, and a cylindrical conductive layer applied on an inner surface of each of said terminal insertion holes, wherein said conductive layer is not exposed on said surfaces along said vertical direction.
Dependencies are inferred from the claim text.