Cantilever type RF (Radio Frequency) needle card

Abstract

The utility model discloses a cantilever type RF (Radio Frequency) needle card, which comprises a PCB (Printed Circuit Board) and a plurality of RF needles, the RF needles are obliquely fixed on the PCB, and the PCB is grounded; the RF needle comprises a needle head part, a needle body part and a needle tail part, the needle head part comprises a needle tip and a connecting part, and the needle tip and the connecting part are bent; the outer side of the needle body part is sleeved with a protective sleeve, and the protective sleeve comprises an insulating layer, a shielding layer and an outer skin layer from inside to outside; and the needle tail part is connected with the SMA connector. According to the utility model, the effect of a radio frequency card is realized in the form of a cantilever needle card, and the final product can reach about 10GHz which cannot be achieved by a common cantilever needle card; the protective sleeve is sleeved on the outer side of the RF needle, the insulating layer and the shielding layer are utilized to ensure that the whole needle can reach impedance matching of 50 ohms, and a radio frequency SMA connector is connected to the tail of the needle subsequently, so that the needle can be conveniently connected with a test end of a client for accurate test.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency pin cards, in particular to a cantilever type RF radio frequency pin card. Background Art

[0002] The probe card is the interface between the chip under test and the tester in wafer testing. It is mainly used to conduct preliminary testing on the electrical performance of the chip before chip packaging, and to screen out defective chips before proceeding to subsequent packaging projects. Therefore, the role of the probe card is crucial and it is a core semiconductor testing consumable.

[0003] Most RF products require RF probes for testing. Conventional RF probe cards are mainly used for testing high-frequency chips, especially in the RF field, such as chip testing for wireless communication technologies such as 5G and WiFi. However, conventional RF probe cards have a single detection end and need to detect the detection points one by one, resulting in reduced work efficiency. Conventional cantilever probe cards are limited by the operating frequency and cannot accurately detect RF products. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a cantilever RF radio frequency pin card, which realizes the effect of a radio frequency card in the form of a cantilever pin card and meets the testing requirements of different radio frequency products.

[0005] To this end, the technical solution of the utility model is: a cantilever RF radio frequency needle card, including a PCB board and a plurality of RF radio frequency needles, the RF radio frequency needles are fixed on the PCB board at an angle, and the PCB board is grounded; the RF radio frequency needle includes a needle head, a needle body and a needle tail, the needle head includes a needle tip and a connecting part, and the needle tip and the connecting part are bent; a protective cover is provided on the outside of the needle body, and the protective cover is respectively an insulating layer, a shielding layer and an outer skin layer from the inside to the outside; the needle tail is connected to the SMA connector.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the diameter of the needle tip is 8 mil and the length of the connecting part is 2.0 mm.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the PCB board is provided with a plurality of mounting holes, and the RF radio frequency needles are obliquely inserted into the mounting holes and fixed by epoxy resin.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the inclination angle of the RF radio frequency needle is 45 degrees, and the needle tips of all RF radio frequency needles are close to the center position and face downward.

[0009] On the basis of the above solution and as a preferred solution of the above solution: the front end of the protective sleeve is sealed and fixed to the needle body by glue, and the rear end is fixed to the SMA connector by tin.

[0010] On the basis of the above solution and as an optimized solution of the above solution: the RF radio frequency needle body is made of rhenium tungsten material.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: the effect of a radio frequency card is achieved by using the form of a cantilever needle clamp, and the final product can reach about 10 GHz, which cannot be achieved by an ordinary cantilever needle clamp; a protective sleeve is sleeved outside the RF radio frequency needle, and an insulating layer and a shielding layer are used to ensure that the impedance matching of the whole needle can reach 50 ohms. Subsequently, an RF SMA connector is connected to the needle tail, which is convenient to be connected to the test end of the customer for accurate testing. Description of the Drawings

[0012] Figure 1 is a schematic structural view of the present utility model;

[0013] Figure 2 is a schematic structural view of the RF radio frequency needle of the present utility model;

[0014] Figure 3 is a structural sectional view of the protective sleeve of the present utility model.

[0015] The labels in the figure are: PCB board 1, RF radio frequency needle 2, needle tip 21, connecting part 22, epoxy resin 3, protective sleeve 4, insulating layer 41, shielding layer 42, outer skin layer 43, glue 5, SMA connector 6, solder 7. Detailed Embodiment

[0016] In the description of the present utility model, it should be noted that for orientation terms, if there are terms such as "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0017] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically and clearly defined.

[0018] Refer to the attached drawings. The cantilever RF needle card described in this embodiment includes a PCB board 1 and a number of RF needles 2. A number of mounting holes are provided on the PCB board 1, and the RF needles 2 are obliquely inserted into the mounting holes of the PCB board 1 and fixed by epoxy resin 3. The inclination angle of the RF needle 2 is 45 degrees, and the tips 21 of all the RF needles 2 approach the center position and face downward.

[0019] The whole RF needle 2 is made of rhenium tungsten material. The RF needle includes a needle head part, a needle body part and a needle tail part. The needle head part includes a tip 21 and a connecting part 22. The tip 21 and the connecting part 22 are bent, and the included angle is an obtuse angle. The diameter of the tip 21 is 8 mil, and the length L of the connecting part 22 is 2.0 mm.

[0020] A protective sleeve 4 is sleeved outside the needle body part. The protective sleeve 4 is composed of an insulating layer 41, a shielding layer 42 and an outer skin layer 43 from the inside to the outside. This protective sleeve 4 can be made of semi-rigid cable. A conventional semi-rigid cable is composed of a core wire, an insulating layer, a shielding layer and an outer skin layer. During production, the core wire inside the cable is taken out, and the RF needle is inserted. The needle body part of the RF needle 2 replaces the position of the original core wire, so as to ensure that the whole needle can achieve an impedance match of 50 ohms. At the same time, the front end of the protective sleeve 4 and the needle body part are sealed and fixed by glue 5.

[0021] The needle tail part is connected to an SMA connector 6. The periphery of the connection between the rear end of the protective sleeve 4 and the SMA connector 6 is fixed by solder 7, and the two are fixed together. The SMA connector 6 of the radio frequency is convenient to connect with the test end of the customer.

[0022] During manufacturing, first make the RF needle 2, put the protective sleeve 4 on the needle body part and fix it with glue 5, bend the tip 21 into shape, and fix the SMA connector 6 at the needle tail part; then make the PCB board 1, and insert the RF needles 2 into the mounting holes of the PCB board 1 in turn, and fix them with epoxy resin 3, so that the tips 21 of the RF needles 2 approach the middle and the tips 21 face downward vertically, which is convenient for signal acquisition.

[0023] The above is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A cantilever RF pin card, characterized in that: It includes a PCB board and several RF needles, which are fixed on the PCB board at an angle, and the PCB board is grounded; the RF needle includes a needle head, a needle body and a needle tail, the needle head includes a needle tip and a connecting part, and the needle tip and the connecting part are bent; a protective sleeve is sheathed on the outer side of the needle body, and the protective sleeve includes an insulating layer, a shielding layer and an outer skin layer from the inside to the outside; the needle tail is connected to an SMA connector.

2. A cantilever RF pin card as claimed in claim 1, characterized in that: The needle tip diameter is 8 mil and the connecting portion length is 2.0 mm.

3. The cantilever RF pin card according to claim 1, characterized in that: The PCB board is provided with a plurality of mounting holes, and the RF radio frequency needles are obliquely inserted into the mounting holes and fixed by epoxy resin.

4. The cantilever RF pin card according to claim 1, characterized in that: The inclination angle of the RF needle is 45 degrees, and the needle tips of all the RF needles are close to the center position and face downward.

5. The cantilever RF pin card according to claim 1, characterized in that: The front end of the protective sleeve is sealed and fixed to the needle body by glue, and the rear end is fixed to the SMA connector by tin.

6. The cantilever RF pin card according to claim 1, characterized in that: The RF radio frequency needle body is made of rhenium tungsten.

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