US6353539B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for matched length routing of back-to-back package placement
Assignee: Intel Corp
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Filing: 1998-07-21
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Granted: 2002-03-05
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Expires: 2018-07-21
Abstract
Abstract A printed circuit board includes a first component mounted on a first side of the printed circuit board. A second component has an identical pin-out as the first component. The second component is mounted on a second side of the printed circuit board. A first signal line connects a first landpad coupled to a first contact on the first component with a second landpad coupled to a corresponding first contact on the second component. A second signal line connects a third landpad coupled to a second contact on the first component with a fourth land pad coupled to a corresponding second contact on the second component. The first signal line has is equal in length to the second signal line.
Inventors
- 👤 Bryce D. Horine
- 👤 Michael W. Leddige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:35
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0237; H05K1/0248; H05K1/025; H05K1/18; H05K1/181; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/09218; H05K2201/09263; H05K2201/09654; H05K2201/09781; H05K2201/10; H05K2201/10007; H05K2201/10159; H05K2201/10431; H05K2201/10507; H05K2201/10545
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
190 words
A method for routing signals between a first component on a first side of a printed circuit board (PCB) and a second component, with an identical pin-out as the first component, on a second side of the PCB, comprising: matching a first pitch of a first trace carrying a first signal from a first via on the first side of the PCB to a second via on the second side of the PCB with a second pitch of a second trace carrying a second signal from a third via on the first side of the PCB to a fourth via on the second side of the PCB; and matching distances of connections between the first via and a first land pad that is connected to a first contact of the first component, the second via and a second land pad that is connected to a first contact of the second component, the third via and a third land pad that is connected to a second contact of the first component, and the fourth via and a fourth land pad that is connected to a second contact of the second component.
Claim 2
Independent Claim
190 words
A method for routing signals between a first component on a first side of a printed circuit board (PCB) and a second component, with an identical pin-out as the first component, on a second side of the PCB, comprising: matching a first pitch of a first trace carrying a first signal from a first via on the first side of the PCB to a second via on the second side of the PCB with a second pitch of a second trace carrying a second signal from a third via on the first side of the PCB to a fourth via on the second side of the PCB; and matching distances of connections between the first via and a first land pad that is connected to a first contact of the first component, the second via and a second land pad that is connected to a first contact of the second component, the third via and a third land pad that is connected to a second contact of the first component, and the fourth via and a fourth land pad that is connected to a second contact of the second component.
Claim 3
Dependent Claim
48 words
The method of claim 1 , wherein matching the first pitch with the second pitch comprises selecting a placement of the first, second, third, and fourth vias such that a distance between the first and second vias is equal to a distance between the third and fourth vias.
Claim 4
Dependent Claim
26 words
The method of claim 2 , wherein selecting the placement of the first, second, third, and fourth vias comprises crossing the second and the fourth vias.
Claim 5
Dependent Claim
23 words
The method of claim 1 , wherein the step of matching the distances of the connections comprises adding stub length to shorter connections.
Claim 6
Dependent Claim
119 words
A printed circuit board (PCB), comprising: a first component mounted on a first side of the printed circuit board; a second component, having an identical pin-out as the first component, mounted on a second side of the printed circuit board; a first signal line that connects a first landpad coupled to a first contact on the first component with a second landpad coupled to a corresponding first contact on the second component; and a second signal line that connects a third landpad coupled to a second contact on the first component with a fourth land pad coupled to a corresponding second contact on the second component, the first signal line having a length equal to the second signal line.
Claim 7
Dependent Claim
119 words
A printed circuit board (PCB), comprising: a first component mounted on a first side of the printed circuit board; a second component, having an identical pin-out as the first component, mounted on a second side of the printed circuit board; a first signal line that connects a first landpad coupled to a first contact on the first component with a second landpad coupled to a corresponding first contact on the second component; and a second signal line that connects a third landpad coupled to a second contact on the first component with a fourth land pad coupled to a corresponding second contact on the second component, the first signal line having a length equal to the second signal line.
Claim 8
Dependent Claim
49 words
The PCB of claim 5 , wherein the first signal line comprises a first trace that resides on a first internal layer of the PCB that connects to a first via on the first side of the PCB and a second via on the second side of the PCB.
Claim 9
Dependent Claim
48 words
The PCB of claim 6 , wherein the second signal line comprises a second trace that resides on a second internal layer of the PCB that connects a third via on the first side of the PCB and a fourth via on the second side of the PCB.
Claim 10
Dependent Claim
49 words
The PCB of claim 7 , wherein the first signal line further comprises: a first stub, that connects the first via to the first land pad, having a first stub length; and a second stub, that connects the second via to the second landpad, having a second stub length.
Claim 11
Dependent Claim
48 words
The PCB of claim 8 , wherein the second signal line further comprises: a third stub, that connects the third via to the third landpad, having a third stub length; and a fourth stub, that connects the fourth via to the fourth landpad, having a fourth stub length.
Claim 12
Dependent Claim
14 words
The PCB of claim 9 , wherein the first and third vias are crossed.
Claim 13
Dependent Claim
14 words
The PCB of claim 9 , wherein the second and fourth vias are crossed.
Claim 14
Dependent Claim
16 words
The PCB of claim 7 , wherein the first and second traces are equal in length.
Claim 15
Dependent Claim
17 words
The PCB of claim 9 , wherein the first, second, third, and fourth stub lengths are equal.
Claim 16
Dependent Claim
116 words
A memory module, comprising: a first memory device residing on a first side of the memory module; and a second memory device, serially connected to the first memory device, residing on a second side of the memory module; a first signal line that connects a first landpad coupled to a first contact of the first memory device to a second landpad coupled to a first contact of the second memory device; and a second signal line that connects a third landpad coupled to a second contact of the first memory device to a fourth landpad coupled to a second contact of the second memory device, wherein the first and second signal lines are equal in length.
Claim 17
Dependent Claim
116 words
A memory module, comprising: a first memory device residing on a first side of the memory module; and a second memory device, serially connected to the first memory device, residing on a second side of the memory module; a first signal line that connects a first landpad coupled to a first contact of the first memory device to a second landpad coupled to a first contact of the second memory device; and a second signal line that connects a third landpad coupled to a second contact of the first memory device to a fourth landpad coupled to a second contact of the second memory device, wherein the first and second signal lines are equal in length.
Claim 18
Dependent Claim
41 words
The memory module of claim 14 , wherein the first signal line comprises a first trace that connects a first via on the first side of the memory module to a second via on the second side of the memory module.
Claim 19
Dependent Claim
41 words
The memory module of claim 14 , wherein the second signal line comprises a second trace that connects a third via on the first side of the memory module to a fourth via on the second side of the memory module.
Claim 20
Dependent Claim
53 words
The memory module of claim 15 , wherein the first signal line further comprises: a first stub that connects a first land pad connected to the first memory device to the first via; and a second stub that connects a second land pad connected to the second memory device to the second via.
Claim 21
Dependent Claim
53 words
The memory module of claim 15 , wherein the second signal line further comprises: a third stub that connects a third land pad connected to the first memory device to the third via; and a fourth stub that connects a fourth land pad connected to the second memory device to the fourth via.
Claim 22
Dependent Claim
17 words
The memory module of claim 14 , wherein the first and second memory devices have identical pin-outs.
Claim 23
Dependent Claim
29 words
The memory module of claim 14 , further comprising a third memory device, serially connected to the second memory device, residing on the first side of the memory module.
Claim 24
Dependent Claim
132 words
A computer system, comprising: a bus; a processor coupled to the bus; and a memory module, coupled to the bus, including: a first memory device residing on a first side of the memory module; a second memory device, serially connected to the first memory device, residing on a second side of the memory module; a first signal line that connects a first landpad coupled to a first contact of the first memory device to a second landpad coupled to a first contact of the second memory device; and a second signal line that connects a third landpad coupled to a second contact of the first memory device to a fourth landpad coupled to a second contact of the second memory device, wherein the first and second signal lines are equal in length.
Claim 25
Dependent Claim
132 words
A computer system, comprising: a bus; a processor coupled to the bus; and a memory module, coupled to the bus, including: a first memory device residing on a first side of the memory module; a second memory device, serially connected to the first memory device, residing on a second side of the memory module; a first signal line that connects a first landpad coupled to a first contact of the first memory device to a second landpad coupled to a first contact of the second memory device; and a second signal line that connects a third landpad coupled to a second contact of the first memory device to a fourth landpad coupled to a second contact of the second memory device, wherein the first and second signal lines are equal in length.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-03-04 | 2005-09-03 | 2006-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-03-04 | 2009-09-03 | 2010-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-03-04 | 2013-09-03 | 2014-03-05 | $7700.00 | Window Closed / Lapsed |