Information handling system high density motherboard
An information handling system motherboard integrates components through integrated wirelines, including at least some components coupled to the motherboard on opposite sides of a narrow region, such as formed by an opening that accepts a cooling fan. A bridge circuit board couples to contacts of the motherboard on opposing sides of the narrow region so that wirelines integrated in the bridge circuit board interface motherboard wirelines, thus offering greater communication density across the narrow region.
1. An information handling system comprising:
a portable housing;
processing components operable to cooperate to process information;
a motherboard coupled to the portable housing and integrating wirelines that interface signals between the processing components, the processing components coupled to the motherboard, the motherboard having an opening that defines a narrow region, and at least some of the wirelines passing through the narrow region;
a first set of plural pads disposed at an upper surface of the motherboard and interfaced with a first set of the wirelines at a first side of the narrow region;
a second set of plural pads disposed at the upper surface of the motherboard and interfaced with a second set of the wirelines at a second side of the narrow region; and
a bridge printed circuit board having a third set of plural pads disposed at a lower surface on one side and a fourth set of plural pads disposed at the lower surface on an opposing side, the bridge printed circuit board integrating wirelines that interface the third and fourth set of plural pads;
wherein the bridge printed circuit board couples to the motherboard to align the first set of plural pads with the third set of plural pads and to align the second set of plural pads with the fourth set of plural pads, the bridge printed circuit board routing at least some of the signals of the motherboard across the narrow region; and
wherein at least some of the motherboard wirelines directly interface a first of the processing components coupled to a first side of the narrow region with a second of the processing components coupled to a second side of the narrow region through a high speed link of the at least some of the wirelines passing through the narrow region and a low speed link of the bridge printed circuit board wirelines.
2. The information handling system of claim 1 further comprising:
a cooling fan coupled to the motherboard in the opening and aligned to exhaust at one side of the motherboard, the narrow region opposite the exhaust;
wherein at least some of the processing components couple to the motherboard on opposite sides of the cooling fan and interface at least some of the signals through the bridge circuit board.
3. The information handling system of claim 2 wherein the bridge circuit board upper circuit has an insulating layer without any components.
4. The information handling system of claim 2 wherein the motherboard wirelines communicate signals between first and second of the plural processing components through the narrow region, the signals including high speed signals and low speed signals, the high speed signals routed through the motherboard wirelines passing through the narrow region, the low speed signals routed through the bridge printed circuit board wirelines.
5. The information handling system of claim 2 wherein the motherboard wirelines communicate signals and power between first and second of the processing components through the narrow region, the signals routed through the motherboard wirelines passing through the narrow region, the power routed through the bridge printed circuit board wirelines.
6. The information handling system of claim 2 further comprising:
a ball grid array socket coupled to the motherboard to interface with the first and second sets of plural pads;
wherein the bridge printed circuit board couples to the ball grid array socket to interface the third set of plural pads to the first set of plural pads and the fourth set of plural pads to the second set of plural pads.
7. The information handling system of claim 2 further comprising:
a fifth set of plural pads disposed at an upper surface of the bridge printed circuit board and interfaced through the bridge printed circuit board with the first set of plural pads; and
a cable connector coupled to the fifth set of plural pads.
8. The information handling system of claim 7 further comprising a cable coupled to the cable connector at a first end of the cable and to the motherboard at an opposing second end of the cable.
9. The information handling system of claim 1 further comprising:
a fifth set of plural pads disposed at an upper surface of the bridge printed circuit board and interfaced through the bridge printed circuit board with the first set of plural pads; and
a second bridge printed circuit board having a sixth set of plural pads disposed on a lower surface of the second bridge printed circuit board, the fifth and sixth sets of plural pads aligned to communicate the signals from the motherboard to the second bridge printed circuit board.
10. A motherboard comprising:
an insulating material integrating plural motherboard wirelines and forming an opening that defines a narrow region;
a first set of contacts exposed at an upper surface of the insulating material on a first side of the narrow region, at least some of the first set of contacts interfacing with the plural motherboard wirelines;
a second set of contacts exposed at the upper surface of the insulating material on a second side of the narrow region, at least some of the second set of contacts interfacing with the plural motherboard wirelines; and
a bridge printed circuit board integrating plural bridge wirelines terminating at a third set of contacts exposed at opposing sides of the bridge printed circuit board;
a component coupled to the at least some of the first set of contacts and communicating through at least a first wireline with a high speed link and a second wireline with a low speed link;
wherein the bridge printed circuit board third set of contacts couple to at least some of the first and second set of contacts to interface the plural motherboard wirelines located between the first and second sides of the narrow region through the bridge wirelines integrated in the bridge printed circuit board;
wherein at least some of the plural motherboard wirelines directly interface contacts of the first and second set of contacts through the narrow region;
wherein the high speed link communicates through the plural motherboard wirelines through the narrow region; and
wherein the low speed link communicates through the plural bridge wirelines.
11. The motherboard of claim 10 further comprising a cable connector coupled to the bridge printed circuit board and interfaced with the plural bridge wirelines.