BACKGROUND
1. FIELD
The present disclosure relates to an apparatus and a method for improving signal integrity probing. In particular, the present disclosure provides for improving signal integrity probing by providing a conductive elastomer on a cable or a microcoaxial cable.
2. THE RELATED ART
Signal integrity probing requires good electrical connections. However there are problems that prevent good electrical connections from being formed with the contact surface to be probed. The contact surface that is the subject of the probing may typically have oxides, oils or debris formed on its surface. Such deposits will make it difficult if not impossible to effect a good probing contact and thus impair a good electrical connection. It would be desirable to effect good electrical connections for improved signal integrity probing.
SUMMARY
It would be desirable to provide a method and structure for improving signal integrity that avoids the drawbacks of the aforementioned problems. This is accomplished by providing a method and structure for improving signal integrity probing by threading a coaxial or microcoaxial cable, having a conductive elastomer, thereon through an optional alignment substrate where the cable is used to support or align the cable or an array of cables.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a sectional view of a first embodiment of the present disclosure in which a coaxial or micro coaxial cable extends through an alignment substrate (which can be either a conductive or non-conductive substrate) and conductive elastomers are provided to the center conductor region in a column near where the shield of the cable and the top surface of the substrate meet;
FIG. 2 is a sectional view of a second embodiment of the present disclosure in which a coaxial or micro coaxial cable extends through an alignment substrate (which can be either a conductive or non-conductive substrate) and conductive elastomers are provided to the center conductor region in a column near where the shield of the cable and the top surface of the substrate meet and also applied to the bottom side of the substrate; and
FIG. 3 is another embodiment of the present disclosure in which an elastomer is mounted on a conductive disc 25 which is placed into contact with the central conductor region of a coaxial or microcoaxial cable.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)
The present application incorporates the subject matter of patent application Ser. No. 13/815,737 filed on Mar. 15,2013 by reference thereto. The substrate 10 is preferably formed as either an electrically conductive metal or as an insulator. The cable 5 has an outer metallic shell 6. The metallic shell 6 remains in intimate contact with the substrate 10 and is preferably soldered 8 to provide good electrical connection.
The cable 5 has a top side 8 that is preferably flush with the top side 9 of the substrate 10. The cable 5 has a bottom side 11 that is preferably flush with a bottom side 12 of the substrate 10 or extends outward from the bottom side 12 of the substrate 10 (as shown in FIG. 1) and is free to accept a traditional connector or can be attached to an electronic assembly through any conventional techniques known in the art.
As seen in FIG. 1, a conductive elastomer 13 is applied to the center conductor region 19 (insulated from outer coaxial cables by coaxial dielectic 21) in a column 14. This conductive elastomer 13 is preferably applied in the ground shielding region 15 where the shield of the cable 5 and the top surface 9 of the substrate 10 meet. These conductive elastomeric regions are preferably isolated from each other in order to prevent electrical shorting (as shown in FIGS. 1 and 2). Optionally a nonconductive substrate can be applied in the open areas on top 9 of the substrate 10 around the conductive elastomers 13 close enough to provide room for the elastomer 13 to expand when it is compressed (as seen in FIG. 1 with compression stops 18) but will prevent it from over compression and damage. In FIG. 1 a low contact resistance metal can be employed to form a pad 16 having sharp points or “aspirates” 17 that are formed on top 9 of the substrate 10 to help penetrate oxides, oils of debris that may form on the subject contact point that is intended to be probed.
As in FIG. 1, FIG. 2 illustrates a method and apparatus in which a low contact resistance metal can be employed to form a pad 16 having sharp points or “aspirates” 17 that are formed on top 9 of the substrate 10 to help penetrate oxides, oils or debris that may form on the subject contact point that is intended to be probed. In addition in the embodiment of FIG. 2 this same structure and method for the top side 9 of the substrate 10 can also be used for the bottom side 12 of the substrate 10 to provide for a high speed, high band width connector.
FIG. 3 illustrates another embodiment of the present disclosure. In FIG. 3 the conductive elastomer 13 can preferably be affixed onto an electrically conductive metallic disc 25 that is placed in fixed contact with a center conductor region 19 of at least one of the coaxial or microcoaxial cables 5 as described in the patentee's pending patent application Ser. No. 13/815,737 filed on Mar. 15, 2013 which is incorporated by reference thereto. The conductive disc 25 can be preferably a metallic disc 25. For an array of coaxial cables or microcables 5 a similar embodiment is possible with elastomers 13 mounted on conductive discs 25 that are placed in contact with each central conductor region 18 for each of the cables or microcables 5.
While presently preferred embodiments have been described for the purposes of the disclosure, it is understood that numerous changes in the arrangement of apparatus parts can be made by those skilled in the art. Such changes are encompassed within the spirit of the invention as defined by the appended claims.
Patent Application
20150027749
