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US 8,525,042 B2Granted
Printed circuit board and printed circuit board unit
AssigneeFujitsu Limited
InventorsMitsunori Abe, Takashi Fukuda
Life of this patent
Estimating the term…
Abstract
A printed circuit board on which a surface mount electronic device is mounted. The printed circuit board includes a substrate on which land arrangements are disposed in an array. Each land arrangement includes a core portion and drawing portions. The drawings are disposed along diagonal directions relative to the core portions of the array of the land arrangements.
Claims15
A printed circuit board on which a surface mount electronic device is mounted, comprising:
- a substrate;
- and
- a plurality of land arrangements disposed in an array on the substrate,
- each land arrangement including a core portion and multiple, discrete drawing portions,
- the plurality of land arrangements being disposed in the array such that centers of the respective core portions form a quadrangle when virtually connected with four lines, and
- the drawing portions are disposed along diagonal lines passing through the center of the quadrangle.
3 more elements
A printed circuit board on which a surface mount electronic device is mounted, comprising:
- a substrate;
- and
- a plurality of land arrangements disposed in an array on the substrate, each land arrangement including a core portion and drawing portions, the drawing portions being disposed in accordance with a contour line of a concentric circle with respect to a central region of the substrate based on a warpage shape of the substrate.
A printed circuit board unit comprising:
- a surface mount electronic device;
- and
- a printed circuit board on which the surface mount electronic device is mounted with solder,
- wherein the printed circuit board includes:
- a substrate;
- and
- a plurality of land arrangements disposed in an array on the substrate,
- each land arrangement including a core portion and multiple, discrete drawing portions,
- the plurality of land arrangements being disposed in the array such that centers of the respective core portions form a quadrangle when virtually connected with four lines, and
- the drawing portions are disposed along diagonal lines passing through the center of the quadrangle.
7 more elements
Dependencies are inferred from the claim text.