IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0294966
(2002-11-14)
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발명자
/ 주소 |
- Winings, Clifford L.
- Shuey, Joseph B.
- Lemke, Timothy A.
- Hull, Gregory A.
- Smith, Stephen B.
- Sercu, Stefaan Hendrik Josef
- Houtz, Timothy W.
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출원인 / 주소 |
- FCI Americas Technology, Inc.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
76 인용 특허 :
74 |
초록
▼
Lightweight, low cost, high density electrical connectors are disclosed that provide impedance controlled, high-speed, low interference communications, even in the absence of shields between the contacts, and that provide for a variety of other benefits not found in prior art connectors, such as low
Lightweight, low cost, high density electrical connectors are disclosed that provide impedance controlled, high-speed, low interference communications, even in the absence of shields between the contacts, and that provide for a variety of other benefits not found in prior art connectors, such as low insertion loss. Signal contacts and ground contacts within the connectors can be scaled and positioned relative to one another such that a differential signal in a first differential signal pair produces a high field in the gap between the contacts that form the signal pair and a low field near an adjacent signal pair. Consequently, cross talk between adjacent signal contacts can be limited to acceptable levels for the particular application. In such connectors, the level of cross talk between adjacent signal contacts can be limited to the point that the need for (and cost of) shields between adjacent contacts is unnecessary, even in high speed, high signal integrity applications.
대표청구항
▼
1. An electrical connector assembly comprising:a first connector comprising: a first differential signal pair positioned along a first linear array of electrical contacts; a second differential signal pair positioned along a second linear array of electrical contacts, wherein the second linear array
1. An electrical connector assembly comprising:a first connector comprising: a first differential signal pair positioned along a first linear array of electrical contacts; a second differential signal pair positioned along a second linear array of electrical contacts, wherein the second linear array of electrical contacts is positioned adjacent to the first linear array of electrical contacts; and a third differential signal pair positioned along a third linear array of electrical contacts, wherein the third linear array of electrical contacts is positioned adjacent to the second linear array of electrical contacts; and a second connector comprising a fourth linear array of electrical contacts, a fifth linear array of dectrical contacts positioned adjacent to the fourth linear array of electrical contacts, and a sixth linear array of electrical contacts positioned adjacent to the fifth linear array of electrical contacts, wherein (i) the first connector is devoid of shields between the first, second, and third linear ariay of electrical contacts; (ii) the first and second differential signal pairs each comprise contacts with mating ends that define, in cross-section, an edge and a broadside; (iii) the mating ends of the contacts of the first differential signal pair are positioned edge-to-edge; (iv) the mating ends of the contacts of the second differential signal pair are positioned edge-to-edge; (v) the second connector is devoid of shields between the fourth, fifth, and sixth linear arrays of electrical contacts; (vi) the second differential signal pair is offset by a row pitch or less, in a direction along the second linear array of electrical contacts, with respect to the first differential signal pair and the third differential signal pair; (vii) the first, second, and third linear arrays each extend along imaginary centerlines that have a pitch between them of about two millimeters or less: and (viii) the second linear array of electrical contacts is staggered with respect to each of the first linear array of electrical contacts and the third linear array of electrical contacts. 2. The electrical connector assembly of claim 1, wherein at least one of the first electrical connector and the second electrical connector has a near-end cross-talk of less than about three percent at an initial rise time of approximately 40 picoseconds.3. The electrical connector assembly of claim 1, wherein at least one of tie first electrical connector and the second electrical connector has a far-end cross talk of less than about four percent at an initial rise time of approximately 40 picoseconds.4. The electrical connector assembly of claim 1, further comprising a dielectric base and a ground contact positioned adjacent to the first differential signal pair in the first linear array of electrical contacts, wherein the ground contact extends from the dielectric base a greater distance than the signal contacts that comprise the first differential signal pair.5. The electrical connector assembly of claim 1, wherein at least one of the first electrical connector and the second electrical connector has an insertion loss of less than about 0.7 dB at 5GHz.6. The electrical connector assembly of claim 1, wherein the impedance of the first differential pair is 100±10 Ohms at about a data rate of about 1 Gigabit/sec and 100±10 Ohms at a data rate in the range of 10 Gigabits/sec.7. The electrical connector assembly of claim 1, wherein the first differential signal pair is positioned along a first contact column and the second differential signal pair is positioned along a second contact column.8. The electrical connector assembly of claim 1, comprising a first lead assembly and second lead assembly adjacent to the first lead assembly, wherein the first differential signal pair is disposed on the first lead assembly and the adjacent differential signal pair is disposed on the second lead assembly.9. The electrical connector assembly of claim 1, wherein the mating ends of the contacts of the first differential signal pair are edge-coupled and the mating ends of the contacts of the second differential signal pair are edge-coupled.10. The electrical connector assembly of claim 1, wherein the contacts of the first differential signal pair and the contacts of the second differential signal pair each terminate with a corresponding fusible mounting element.11. The electrical connector assembly of claim 1, having a row pitch of about 1.4 mm.12. The electrical connector assembly of claim 1, having a card pitch of about 25 mm.13. The electrical connector assembly of claim 1, wherein the connector assembly is a right angle, ball grid array connector assembly.14. The electrical connector assembly of claim 1, having a contact density of about 63.5 mated signal pairs per linear inch.15. The electrical connector assembly of claim 1, having a contact density of more than about 63.5 mated signal pairs per linear inch.16. The electrical connector assembly of claim 1, having an insertion loss of less than about 0.7 dB at 5GHz.17. The electrical connector assembly of claim 1, wherein a contact space defined between two facing ends of the two electrical contacts is less than an array space defined between the first linear array of electrical contacts and the second linear array of electrical contacts.18. The electrical connector assembly of claim 17, wherein a signal carried by the first differential signal pair induces a first electric field in the contact space between the two electrical contacts and a second electric field in the array space between the first linear array of electrical contacts and the second linear array of electrical contacts, wherein the first electric field is stronger than the second electric field.19. The electrical connector assembly of claim 17, further comprising an air dielectric in the contact space.20. The electrical connector assembly of claim 17, wherein the contact space is approximately 0.3 to 0.4 mm.21. The electrical connector assembly of claim 1, comprising a housing though which the contacts extend, wherein the housing is filled at least in part with a dielectric material that electrically insulates the contacts.22. The electrical connector assembly of claim 21, wherein the dielectric material is air.23. An electrical connector comprising:a first differential signal pair positioned along a first linear array of electrical contacts, said first linear array extending along a first direction, said first differential signal pair comprising a first electrical contact and a second electrical contact, each of said first and second electrical contacts having a respective mating end, each said mating end having a cross-section defining an edge and a broadside, each said broadside extending along the first direction, the edge of the first electrical contact being positioned adjacent to the edge of the second electrical contact such that a gap is formed between the edges of the first and second electrical contacts; and a second differential signal pair positioned adjacent the first differential signal pair along a second linear array of electrical contacts, said second differential signal pair comprising a third electrical contact and a fourth electrical contact, each of said third and fourth electrical contacts having a respective mating end, each said mating end having a cross-section defining an edge and a broadside, each said broadside extending along the first direction, wherein the second differential signal pair is offset by a row pitch or less in the first direction relative to the first differential signal pair, and the broadside of the third electrical contact fLces the broadside of the second electrical contact, and wherein each of said first and second electrical contacts has a respective terminal end, and wherein the gap has a gap width that varies such that a uniform impedance profile is provided between the electrical contacts from the respective mating ends to the respective terminal ends thereof. 24. The electrical connector of claim 23, wherein the gap has a gap width such that the mating ends of the first and second electrical contacts are edge-coupled.25. The electrical connector of claim 23, wherein the electrical connector is devoid of shields between the first differential signal pair and the second differential signal pair.26. The electrical connector assembly of claim 25, wherein a contact space defined between two facing ends of the two electrical contacts is less than an array space defined between the first linear array of electrical contacts and the second linear array of electrical contacts.27. The electrical conncctor assembly of claim 25, wherein the electrical connector has a near-end cross-talk of less than about three percent at an initial rise time of approximately 40 picoseconds.28. The electrical connector assembly of claim 25, wherein the electrical connector has a far-end cross talk of less than about four percent at an initial rise time of approximately 40 picoseconds.29. The electrical connector of claim 25, further comprising a dielectric base and a ground contact positioned adjacent to the first differential signal pair in the first linear array of electrical contacts, wherein the ground contact extends from the dielectric base a greater distance han the signal contacts that comprise the first differential signal pair.30. The electrical connector of claim 25, wherein the electrical connector has an insertion loss of less than about 0.7 dB at 5GHz.31. The electrical connector of claim 25, wherein the impedance of the first differential pair is 100±10 Ohms at about a data rate of about 1 Gigabit/sec and 100±10 Ohms at a data rate in the range of 10 Gigabits/sec.32. The electrical connector of claim 25, wherein the second linear array of electrical contacts is offset with respect to the first linear array of electrical contacts.33. The electrical connector of claim 25, wherein the first differential signal pair is positioned along a first contact column and the second differential signal pair is positioned along a second contact column.34. The electrical connector of claim 25, comprising a first lead assembly and second lead assembly adjacent to the first lead assembly, wherein the first differential signal pair is disposed on the first lead assembly and the adjacent differential signal pair is disposed on the second lead assembly.35. The electrical connector of claim 25, wherein the mating ends of the contacts of the first differential signal pair are edge-coupled.36. The electrical connector of claim 25, wherein the contacts of the first differential signal pair each terminate with a corresponding fusible mounting element.37. The electrical connector of claim 25, wherein a differential signal in the first differential signal pair produces an electric field having a first electric field strength in a gap between the edges of the contacts of the first differential signal pair and a second electric field strength near the second differential signal pair, wherein the second electric field strength is lower than the first electric field strength.38. The electrical connector of claim 25, having a row pitch of about 1.4 mm.39. The electrical connector of claim 25, having a column pitch of about 2.0 mm or less.40. The electrical connector of claim 25, having a card pitch of about 25 mm.41. The electrical connector of claim 25, wherein the connector assembly is a right angle, ball grid array connector.42. The electrical connector of claim 25, having a contact density of about 63.5 mated signal pairs per linear inch.43. The electrical connector of claim 25, having a contact density of more than about 63.5 mated signal pairs per linear inch.44. The electrical connector of claim 25, having an insertion loss of less than about 0.7 dB at 5GHz.45. The electrical connector assembly of claim 25, wherein a signal carried by the first diffcrential signal pair induces a first electric field in the contact space between the two electrical contacts and a second electric field in the array space between the first linear array of electrical contacts and the second linear array of electrical contacts, wherein the first electric field is stronger than the second electric field.46. The electrical connector of claim 45, further comprising an air dielectric in the contact space.47. The electrical connector of claim 45, wherein the contact space is approximately 0.3 to 0.4 mm.48. The electrical connector of claim 25, comprising a housing though which the contacts extend, wherein the housing is filled at least in part with a dielectric material that electrically insulates the contacts.49. The electrical connector of claim 48, wherein the dielectric material is air.
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