Serial Advanced Technology Installation Cable

Abstract

The invention discloses a serial advanced technology installation (SATA) cable, which comprises a first grounding wire, two data transmission lines, an insulating material covering the two data transmission lines and the first grounding wire, and an insulating sheath covering the insulating material. One end of the first grounding wire 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 bifurcated at the first position and the second position, so as to form a separation at the two ends of the SATA cable. The second ground wire connected to the first transmission interface and 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 The distance between them is less than or equal to a second preset length; the insulating layer included in each data transmission line is used to keep the first ground line and the second ground line open.

Description

technical field [0001] The present invention relates to a cable, in particular to a Serial Advanced Technology Attachment (Serial Advanced Technology Attachment, SATA) cable. Background technique [0002] The traditional method of testing the motherboard or the DAUGHTER BOARD installed on the motherboard is usually to use Manual Visual Inspection (MVI) and electrical testing to conduct Manufacturing Defect Analysis (MDA), line On the test (In Circuit Test, ICT) and function board test (Function board test, FBT). However, with the gradual development of the main board towards miniaturization, densification and multi-layering, the volume of the main board or the small card installed on the main board is getting smaller and smaller, the density of the circuit is getting higher and higher, and the circuit is more complicated. The degree is getting higher and higher, making the above-mentioned test methods not enough, especially the function board test only formulates the test p...

AI Technical Summary

Problems solved by technology

[0003] In the early days when the industry adopted the boundary scan test solution, the wires used were usually the wires used in the functional board test, but the actual test coverage could not achieve the expected ideal effect

In order to improve the above problems, the industry tries to connect the signal line, power line and grounding line in the cable separately, and design the cable in a pin-to-pin (PIN to PIN) way. However, the test stability of this cable is found after verification. Poor, unable to meet the firstpass yield (FPY) required by the production line, so most manufacturers still continue to use the wires used in functional board testing for boundary scan testing

[0004] When the wire rod used for the boundary scan test of the main board or small card to be tested is a SATA transmission line, because the SATA transmission line usually includes a SATA cable with three ground wires and four signal lines arranged in an interspersed manner at adjacent intervals (such as figure 1 as shown, figure 1 It is a schematic structural diagram of an embodiment of an existing SATA cable. The lines in the drawing are ground wire 11a, signal wire 12a, signal wire 12b, ground wire 11b, signal wire 13a, signal wire 13b and ground wire from top to bottom. 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 two cables with seven wires assembled on both sides of the SATA cable A connector with three terminals, in which the three ground wires are connected together through the inner shield (not shown), therefore, there is a boundary scan test due to the specification of the SATA cable (that is, the three ground wires pass through the inner shield connected together) resulting in missing test coverage for the three ground wires in the SATA cable

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