TWI698889B - Serial advanced technology attachment cable - Google Patents

Abstract

A serial advanced technology attachment (SATA) cable is provided. The SATA cable includes a first ground wire, two data transmission lines, an insulating material covering the two data transmission lines and the first ground wire, and an insulating sheath covering the insulating material. One end of the first ground wire is connected to a first transmission interface, and the other end of the first ground wire is connected to a second transmission interface. A shielding layer included in each data transmission line bifurcated at the first position and the second position to form a second ground wire connected to the first transmission interface and the second transmission interface at both ends of the SATA cable. A distance between each first position and the first transmission interface is less than or equal to a first preset length, and a distance between each second position and the second transmission interface is less than or equal to a second preset length. An insulation layer included in each data transmission line is used to keep the first ground wire and the second ground wires open.

Description

Tandem advanced technology installation cable

The invention relates to a cable, particularly a Serial Advanced Technology Attachment (SATA) cable.

In the traditional industry, the method of testing motherboards or DAUGHTER BOARD installed on the motherboard usually adopts manual visual inspection (MVI) and electrical testing, manufacturing defect analysis (MDA), online Test (In Circuit Test, ICT) and Function board test (FBT). However, with the gradual development of motherboards in the direction of miniaturization, densification, and multi-layering, the size of motherboards or small cards installed on the motherboard is getting smaller and smaller, the density of circuits is increasing, and the complexity of circuits is increasing. Higher and higher levels make the aforementioned test methods inadequate. In particular, the function board test only develops a test plan from a functional point of view. It can only confirm the function of the motherboard or small card under test, but cannot accurately locate the motherboard or small card under test. The specific pins of the card cannot guarantee the test coverage of its power line and ground line. Therefore, in order to ensure the correctness of circuit functions and high reliability, the industry has changed to use boundary scan solutions to test the motherboard or small cards installed on the motherboard to enhance the test positioning accuracy and effectively improve its power cord Test coverage with ground wire.

When the industry adopts the boundary scan test solution in the initial stage, the wire used in the test usually uses the wire used in the functional board test, but the actual test coverage cannot achieve the desired desired effect. In order to improve the above problems, the industry tried to connect the signal wires, power wires and ground wires in the wires individually, using the pin to pin (PIN to PIN) method to design the wires. However, this wire was found to have poor test stability after verification , Unable to meet the First Pass Yield (FPY) required by the production line, so most companies continue to use the wires used in the functional board test for boundary scan tests.

When the wire used in the boundary scan test of the motherboard or small card under test is a SATA transmission line, the SATA transmission line usually includes a SATA cable with three ground wires and four signal wires arranged in adjacent intervals (such as "No. As shown in Figure 1, Figure 1 is a schematic diagram of the structure of an embodiment of an existing SATA cable. The lines in the figure are ground wire 11a, signal wire 12a, signal wire 12b, and ground wire 11b from top to bottom. , Signal line 13a, signal line 13b and ground line 11c, wherein signal line 12a and signal line 12b are a pair of differential signal lines, signal line 13a and signal line 13b are another pair of differential signal lines) and assembled in The two seven-terminal connectors on both sides of the SATA cable, of which, the three ground wires are connected together through the internal shielding layer (not drawn). Therefore, there is a boundary scan test due to the specifications of the SATA cable (ie The three ground wires are completely connected together through the internal shielding layer), resulting in a lack of test coverage for the three ground wires in the SATA cable.

The invention discloses a SATA cable.

The present invention discloses a SATA cable, one end of which is assembled with a first transmission interface, and the other end is assembled with a second transmission interface. The SATA cable includes: a first ground wire, two data transmission wires, an insulating material and an insulating sheath covering the insulating material. Wherein, one end of the first ground wire is connected to the first transmission interface, The other end is connected to the second transmission interface; each data transmission line includes a differential line pair, a shielding layer covering the differential line pair, and an insulating layer covering the shielding layer. Each differential line pair includes two differential lines, and one end of each differential line The first transmission interface is connected, and the other end is connected to the second transmission interface; the shielding layer included in each data transmission line is bifurcated at its first and second positions to form the first transmission interface at both ends of the SATA cable. And the second ground wire connected to the second transmission interface, the distance between each first position and the first transmission interface is less than or equal to the first preset length, and the distance between each second position and the second transmission interface is less than Or equal to the second predetermined length; the insulating layer included in each data transmission line is used to keep the first ground line and the second ground lines open; the insulating material is used to cover the two data transmission lines, the first ground line and the These second ground wires.

In one embodiment, the length of the SATA cable is less than fifty centimeters.

In one embodiment, the first predetermined length is one centimeter.

In one embodiment, the second predetermined length is one centimeter.

In one embodiment, each differential line included in each data transmission line is covered with another insulating layer.

In one embodiment, the outer periphery of the first ground wire is covered with another insulating layer.

In one embodiment, the first ground line is disposed between the two data transmission lines.

In an embodiment, the shielding layer included in each data transmission line is copper foil or aluminum foil.

The SATA cable disclosed in the present invention is as above. The difference from the prior art is that the shielding layer included in each data transmission line is bifurcated at its first and second positions to form two ends of the SATA cable. The second ground wire connected to the first transmission interface and the second transmission interface respectively, the distance between each first position and the first transmission interface is less than or equal to the first predetermined length, each The distance between the second position and the second transmission interface is less than or equal to the second predetermined length, and the insulating layer included in each data transmission line is used to keep the first ground line and the second ground lines open.

Through the above-mentioned technical means, when the wire used for the boundary scan test of the motherboard or small card under test is the SATA transmission line including the SATA cable of the present invention, the insulating layer included in each data transmission line in the SATA cable is used In order to keep the first ground wire and the second ground wires open (that is, the three ground wires of the SATA cable are kept open), the test coverage of the ground wire of the SATA cable can be effectively improved, and the overcoming The original pin-to-pin design of the wire has poor test stability, which cannot meet the problem of boundary scan test implementation in the industrial field, and then corrects the hardware shortcomings of the test integration solution to meet the production line production use. In addition, when the distance between each first location and the first transmission interface is less than or equal to the first preset length and the distance between each second location and the second transmission interface is less than or equal to the second preset length, It can achieve a relatively ideal shielding effect, ensure the signal transmission reliability of the SATA cable, and thereby make the results of the boundary scan test have higher reliability.

11a, 11b, 11c: ground wire

12a, 12b, 13a, 13b: signal line

30: Wire

50: The first transmission interface

51a, 61a: first signal sending terminal

51b, 61b: first signal receiving terminal

52a, 62a: second signal sending terminal

52b, 62b: second signal receiving terminal

53a, 53b, 53c: first ground terminal

60: The second transmission interface

63a, 63b, 63c: second ground terminal

70a, 70b: differential line

72, 82: shielding layer

74, 84: insulating layer

80a, 80b: differential line

90: insulating layer

92: insulating layer

100: SATA cable

110: first ground wire

120a, 120b: data transmission line

130: insulating material

140: insulating sheath

150a, 150b: second ground wire

160a, 160b: second ground wire

E, M: first position

F, N: second position

L: length

D1, D2, D3, D4: distance

Figure 1 is a schematic diagram of the appearance of an embodiment of a conventional SATA cable.

Figure 2 is a schematic structural diagram of an embodiment of the present invention where the first transmission interface and the second transmission interface are assembled on both sides of the SATA cable.

FIG. 3A is a schematic diagram of an embodiment of the first transmission interface in FIG. 2.

FIG. 3B is a schematic diagram of an embodiment of the second transmission interface in FIG. 2.

Figure 4 is a schematic diagram of the A-A cross-sectional structure of the SATA cable in Figure 2.

FIG. 5 is a schematic diagram of the top cross-sectional structure of the SATA cable of FIG. 2.

Hereinafter, the implementation of the present invention will be described in detail with the drawings and embodiments, so as to fully understand and implement the implementation process of how the present invention uses technical means to solve technical problems and achieve technical effects.

Please refer to "Figure 2". "Figure 2" is a schematic diagram of the appearance of an embodiment of a SATA cable assembled with a first transmission interface and a second transmission interface on both sides of the present invention. In this embodiment, one end of the SATA cable 100 can be assembled with the first transmission interface 50, and the other end can be assembled with the second transmission interface 60. The first transmission interface 50 and the second transmission interface 60 can use surface mount technology. (Surface Mount Technology, SMT) are welded to both ends of the SATA cable 100, or can be fixed to both ends of the SATA cable 100 by clamping. Actually, the first transmission interface 50 and the second transmission interface 60 The method of respectively assembling at both ends of the SATA cable 100 can be adjusted according to actual needs. It should be noted that the length L of the SATA cable 100 refers to the length of the outermost insulating sheath (as shown in "Figure 2"). In this embodiment, the length L of the SATA cable 100 can be less than fifty centimeters. And more than ten centimeters.

Please refer to "Figure 3A" and "Figure 3B", "Figure 3A" is a schematic diagram of an embodiment of the first transmission interface of "Figure 2", and "Figure 3B" is the second of "Figure 2" A schematic diagram of an embodiment of the transmission interface. In this embodiment, the first transmission interface 50 and the second transmission interface 60 can be, but are not limited to, a SATA male connector or a SATA female connector. The first transmission interface 50 can include a first signal sending terminal 51a, a first The signal receiving terminal 51b, the second signal transmitting terminal 52a, the second signal receiving terminal 52b, the first ground terminal 53a, the first ground terminal 53b and the first ground terminal 53c, the second transmission interface 60 may include the first signal transmitting terminal 61a , The first signal receiving terminal 61b, the second signal transmitting terminal 62a, the second signal receiving terminal 62b, the second ground terminal 63a, the second ground terminal 63b, and the second ground terminal 63c.

In this embodiment, the SATA cable 100 may include: a first ground line 110, a data transmission line 120a, a data transmission line 120b, an insulating material 130, and an insulating sheath 140 covering the insulating material 130 (as shown in "Figure 4" and "No. As shown in Figure 5, "Figure 4" is a schematic diagram of the AA cross-sectional structure of the SATA cable in "Figure 2", and "Figure 5" is the top cross-sectional structural diagram of the SATA cable in "Figure 2"). Wherein, the first ground line 110 may be configured between the data transmission line 120a and the data transmission line 120b.

In this embodiment, the data transmission line 120a may include a differential line 70a, a differential line 70b (the differential line 70a and the differential line 70b are a pair of differential lines, that is, a differential line pair), and a shield covering the differential line 70a and the differential line 70b Layer 72 and the insulating layer 74 covering the shielding layer 72, the data transmission line 120a can surround the differential line 70a and the differential line 70b in the space formed by the shielding layer 72 through the shielding layer 72 (as shown in "Figure 4"); The transmission line 120b may include a differential line 80a, a differential line 80b (the differential line 80a and the differential line 80b are a pair of differential lines, that is, a differential line pair), a shielding layer 82 covering the differential line 80a and the differential line 80b, and a coating shielding layer The insulating layer 84 of 82, the data transmission line 120b can surround the differential line 80a and the differential line 80b in the space formed by the shielding layer 82 through the shielding layer 82 (as shown in "Figure 4").

In this embodiment, the outer periphery of the differential line 70a, the differential line 70b, the differential line 80a, and the differential line 80b may be covered with another insulating layer 90 (that is, the outer periphery of each differential line included in each data transmission line is covered with another Insulating layer); the first ground wire 110 includes the wire 30 and the insulating layer 92 covering the wire 30; the shielding layer 72 included in the data transmission line 120a and the shielding layer 82 included in the data transmission line 120b (that is, each data transmission line includes The shielding layer can be, but not limited to, copper foil, aluminum foil, or other metal materials that can shield electromagnetic waves, static electricity, and noise.

Please refer to "Figure 3A", "Figure 3B", "Figure 4" and "Figure 5". In this embodiment, both ends of the lead 30 of the first ground wire 110 can be connected to the first ground terminal respectively 53b and the second ground terminal 63b; both ends of the differential line 70a can be respectively connected to the first signal sending terminal 51a and the first signal connection The receiving terminal 61b and the two ends of the differential line 70b can be respectively connected to the first signal receiving terminal 51b and the first signal sending terminal 61a, and the two ends of the differential line 80a can be respectively connected to the second signal sending terminal 52a and the second signal receiving terminal 62b, Both ends of the differential line 80b can be respectively connected to the second signal receiving terminal 52b and the second signal sending terminal 62a (that is, one end of each differential line is connected to the first transmission interface 50, and the other end of each differential line is connected to the second transmission interface 60 ).

In this embodiment, the shielding layer 72 included in the data transmission line 120a may be branched at its first position M and a second position N, so as to form two ends of the SATA cable 100 with the first transmission interface 50 and the second transmission interface respectively. The second ground wires 150a, 150b connected to the transmission interface 60 (as shown in "Figure 5"). In more detail, the second ground wire 150a branched from the first position M can be connected to the first ground terminal 53a, and the second ground wire 150b branched from the second position N can be connected to the second ground terminal 63a. Wherein, the distance D1 between the first position M and the first transmission interface 50 is less than or equal to the first predetermined length, and the distance D3 between the second position N and the second transmission interface 60 is less than or equal to the second predetermined length; The insulating layer 74 included in the data transmission line 120a is used to allow the first ground line 110 and the second ground lines 150a, 150b (that is, the second ground line 150a formed by branching from the first position M to the The second ground wire 150b) formed by branching out of N remains open.

The shielding layer 82 included in the data transmission line 120b may be branched at its first position E and a second position F to form a first transmission interface 50 and a second transmission interface 60 at both ends of the SATA cable 100. Two ground wires 160a, 160b (as shown in "Figure 5"). In more detail, the second ground wire 160a branched from the first position E can be connected to the first ground terminal 53c, and the second ground wire 160b branched from the second position F can be connected to the second ground terminal 63c. Wherein, the distance D2 between the first position E and the first transmission interface 50 is less than or equal to the first predetermined length, and the distance D4 between the second position F and the second transmission interface 60 is less than or equal to the second predetermined length; The insulating layer 84 included in the data transmission line 120b is used to allow the first A ground wire 110 and the second ground wires 160a, 160b (that is, the second ground wire 160a branched from the first position E and the second ground wire 160b branched from the second position F) Keep it open.

The distance D1 between the first position M and the first transmission interface 50 is the shortest distance between the edge of the insulating layer 74 in contact with the external environment and the first position M (as shown in "Figure 5"). The distance D2 between a position E and the first transmission interface 50 is the shortest distance between the edge of the insulating layer 84 in contact with the external environment and the first position E (as shown in "Figure 5"); the second position N The distance D3 from the second transmission interface 60 is the shortest distance between the edge of the insulating layer 74 in contact with the external environment and the second position N (as shown in "Figure 5"). The second position F and the second The distance D4 between the transmission interfaces 60 is the shortest distance between the edge of the insulating layer 84 in contact with the external environment and the second position F (as shown in "Figure 5").

In this embodiment, the first preset length can be but not limited to one centimeter, the second preset length can be but not limited to one centimeter, the actual first preset length and the second preset length can be adjusted according to actual needs It is worth noting that when the distance between each first location and the first transmission interface is less than or equal to the first preset length and the distance between each second location and the second transmission interface is less than or equal to the second preset When the length is set, an ideal shielding effect can be achieved, and the signal transmission reliability of the SATA cable 100 can be ensured.

In this embodiment, the insulating material 130 is used to cover the data transmission line 120a, the data transmission line 120b, the first ground line 110, and the second ground formed by the first position of the shielding layer included in each data transmission line. The lines 150a, 160a and the second ground lines 150b, 160b formed by branching from the second position of the shielding layer included in each data transmission line (as shown in "Figure 5").

To sum up, it can be seen that the difference between the present invention and the prior art is that the shielding layer included in each data transmission line is bifurcated at its first position and second position, so as to form a separate and a second position at both ends of the SATA cable. A transmission interface and a second ground wire connected to the second transmission interface, each of the first position and the The distance between one transmission interface is less than or equal to the first predetermined length, the distance between each second location and the second transmission interface is less than or equal to the second predetermined length, and the insulating layer included in each data transmission line is used for Keep the first ground wire and the second ground wires open. Therefore, when the wire used for the boundary scan test of the motherboard or the small card to be tested is the SATA transmission line including the SATA cable of the present invention, the insulating layer included in each data transmission line in the SATA cable is used for the first The ground wire and the second ground wires are kept open (that is, the three ground wires of the SATA cable are kept open), so the test coverage of the ground wire of the SATA cable can be effectively improved, and the original pin position can be improved The wire material designed for the pin position method has poor test stability and cannot meet the problem of the implementation of boundary scan testing in the industrial field, and then corrects the shortcomings of the test integration solution in terms of hardware to meet the production line production use. In addition, when the distance between each first location and the first transmission interface is less than or equal to the first preset length and the distance between each second location and the second transmission interface is less than or equal to the second preset length, It can achieve a relatively ideal shielding effect, ensure the signal transmission reliability of the SATA cable, and thereby make the results of the boundary scan test have higher reliability.

Although the present invention is disclosed in the foregoing embodiments as above, it is not intended to limit the present invention. Anyone familiar with similar art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of patent protection shall be determined by the scope of the patent application attached to this specification.

30: Wire

70a, 70b: differential line

72, 82: shielding layer

74, 84: insulating layer

80a, 80b: differential line

90: insulating layer

92: insulating layer

100: SATA cable

110: first ground wire

120a, 120b: data transmission line

130: insulating material

140: insulating sheath

E, M: first position

F, N: second position

D1, D2, D3, D4: distance

Claims (8)

A serial advanced technology installation (SERIAL ADVANCED TECHNOLOGY ATTACHMENT, SATA) cable, one end is assembled with a first transmission interface, and the other end is assembled with a second transmission interface, the SATA cable includes: A first ground wire, one end of which is connected to the first transmission interface, and the other end is connected to the second transmission interface; Two data transmission lines, each of which includes a differential line pair, a shielding layer covering the differential line pair, and an insulating layer covering the shielding layer, wherein each of the differential line pairs includes two differential lines, each One end of a differential line is connected to the first transmission interface, and the other end is connected to the second transmission interface; the shielding layer included in each data transmission line is branched at a first position and a second position, so as to The two ends of the SATA cable form a second ground wire respectively connected to the first transmission interface and the second transmission interface, and the distance between each first position and the first transmission interface is less than or equal to a first The distance between each of the second positions and the second transmission interface is less than or equal to a second predetermined length; the insulating layer included in each data transmission line is used to allow the first ground line to be Keep the second ground wires open; An insulating material for covering the two data transmission lines, the first ground line and the second ground lines; and An insulating skin covers the insulating material. According to the SATA cable of item 1 of the scope of patent application, the length of the SATA cable is less than fifty centimeters and greater than ten centimeters. According to the SATA cable of item 1 of the scope of patent application, the first predetermined length is one centimeter. According to the first SATA cable in the scope of patent application, the second predetermined length is one centimeter. According to the SATA cable of item 1 of the scope of patent application, each of the differential lines included in each of the data transmission lines is covered with another insulating layer. According to the SATA cable of item 1 of the scope of patent application, the outer periphery of the first ground wire is covered with another insulating layer. According to the SATA cable according to item 1 of the scope of patent application, the first ground wire is arranged between the two data transmission lines. According to the first SATA cable in the scope of patent application, the shielding layer included in each data transmission line is copper foil or aluminum foil.

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