Sheet body gold layer structure of ceramic core body

Abstract

The utility model discloses a sheet body gold layer structure of a ceramic core body, which comprises a sheet body forming the ceramic core body, and an electrode gold layer and a shielding gold layer are arranged on the sheet body. The electrode gold layer comprises an electrode body, an electrode lead-out wire and an electrode lead-out point which are connected in sequence; the shielding gold layer comprises a large shielding ring and a small shielding ring which are connected with each other, the large shielding ring surrounds the peripheral side of the electrode body, and the small shielding ring surrounds the peripheral side of the electrode leading-out point; a lead-out port is formed at the joint of the large shielding ring and the small shielding ring, and an electrode lead-out wire passes through the lead-out port; the large shielding ring and the electrode body are spaced, the small shielding ring and the electrode leading-out point are spaced, the electrode leading-out wire and the leading-out port are spaced, and the gap widths of the three are consistent. According to the utility model, the shielding effect of the shielding structure on the gold layer pattern can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic capacitance pressure sensors, in particular to a sheet gold layer structure of a ceramic core. Background Art

[0002] A ceramic capacitive pressure core is a pressure-sensing element in a pressure sensor. It consists of a thicker ceramic fixed substrate and a thinner ceramic pressure-sensing diaphragm, separated by a gap. Gold patterns are printed on the opposing surfaces of the fixed substrate and pressure-sensing diaphragm, forming a parallel plate capacitor.

[0003] When ceramic capacitive pressure cores are used to measure the pressure of conductive liquids, the parasitic capacitance of conductive liquids like water can interfere with the output capacitance of the ceramic core, resulting in inaccurate pressure sensor results. Conventional techniques typically incorporate a shielding ring structure over the gold layer pattern within the ceramic core, but these existing shielding ring structures offer limited shielding effectiveness. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a sheet gold layer structure of a ceramic core, aiming to improve the shielding effect of the shielding structure on the gold layer pattern.

[0005] Technical solution: To achieve the above-mentioned purpose, the utility model provides a sheet gold layer structure of a ceramic core, including a sheet body constituting the ceramic core, with an electrode gold layer and a shielding gold layer on the sheet body; the electrode gold layer includes an electrode body, an electrode lead wire and an electrode lead point connected in sequence; the shielding gold layer includes a large shielding ring and a small shielding ring connected to each other, the large shielding ring is arranged around the outer periphery of the electrode body, and the small shielding ring is arranged around the outer periphery of the electrode lead point; a lead-out port is formed at the connection between the large shielding ring and the small shielding ring, and the electrode lead wire passes through the lead-out port; the large shielding ring is separated from the electrode body by a gap, the small shielding ring is separated from the electrode lead point by a gap, and the electrode lead wire is separated from the lead-out port by a gap, and the gap widths of the three are consistent.

[0006] Furthermore, there is a first lead area on the electrode lead-out point, a second lead area on the small shielding ring, a third lead area on the outside of the large shielding ring, the second lead area is between the first lead area and the third lead area, and an avoidance gap is provided on the outer edge of the large shielding ring corresponding to the third lead area.

[0007] Furthermore, the outer edge of the large shielding ring is circular, and the avoidance gap is arc-shaped.

[0008] Furthermore, the avoidance gap is flared radially outward along the large shielding ring.

[0009] Furthermore, a notch shielding ring is provided at the avoidance notch of the large shielding ring, and the notch shielding ring is correspondingly arranged around the outer periphery of the third lead area.

[0010] Furthermore, the first lead area and the third lead area are symmetrically arranged on both sides of the second lead area, and the mirror image of the notch shielding ring relative to the second lead area can surround the electrode lead-out point.

[0011] Furthermore, the sheet body is a pressure-sensitive diaphragm constituting a ceramic core body.

[0012] Furthermore, the sheet body is a fixed substrate constituting the ceramic core.

[0013] Beneficial effects: The utility model has a ceramic core sheet gold layer structure, and its beneficial effects are as follows:

[0014] 1) The width of all gaps between the shielding gold layer and the electrode gold layer is consistent, so that the shielding gold layer shields the electrode gold layer more evenly and the overall shielding effect is better;

[0015] 2) An avoidance gap is formed outside the large shielding ring at the position corresponding to the third lead area; a notch shielding ring is provided outside the avoidance gap to enhance the shielding effect at the avoidance gap;

[0016] 3) The mirror image of the notched shielding ring relative to the second lead area can surround the electrode lead-out point; therefore, after the pressure-sensitive diaphragm and the fixed substrate form a ceramic core, the notched shielding ring on one of the sheets can have a certain three-dimensional shielding effect on the electrode lead-out point on the other sheet, thereby improving the overall shielding effect of the shielding gold layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attachment Figure 1 This is a schematic diagram of the gold layer structure of the ceramic core of the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] As attached Figure 1 The sheet gold layer structure of the ceramic core includes a sheet body that constitutes the ceramic core, and the ceramic core is composed of a pressure-sensitive diaphragm and a fixed substrate. The pressure-sensitive diaphragm may adopt the sheet structure, the fixed substrate may adopt the sheet structure, or both the pressure-sensitive diaphragm and the fixed substrate may adopt the sheet structure.

[0020] There are electrode gold layer 1 and shielding gold layer 2 on the sheet. Figure 1As shown in , the electrode gold layer 1 includes an electrode body 3, an electrode lead wire 4 and an electrode lead point 5 connected in sequence. The shielding gold layer 2 includes a large shielding ring 6 and a small shielding ring 7 that are connected to each other. The large shielding ring 6 is arranged around the outer periphery of the electrode body 3, and the small shielding ring 7 is arranged around the outer periphery of the electrode lead point 5. After the large shielding ring 6 and the small shielding ring 7 are connected, they are gourd-shaped. A lead-out port 8 is formed at the connection between the large shielding ring 6 and the small shielding ring 7, and the electrode lead wire 4 passes through the lead-out port 8 accordingly. The large shielding ring 6 is separated from the electrode body 3 by a gap, the small shielding ring 7 is separated from the electrode lead point 5 by a gap, and the electrode lead wire 4 is separated from the lead-out port 8 by a gap, and the gap widths of the three are consistent, so that the shielding of the electrode gold layer 1 by the shielding gold layer 2 is more uniform, thereby obtaining a better overall shielding effect.

[0021] There is a first lead area 9 on the electrode lead-out point 5, a second lead area 10 on the small shielding ring 7, and a third lead area 11 on the outside of the large shielding ring 6. The second lead area 10 is between the first lead area 9 and the third lead area 11. Taking the example of the pressure-sensitive diaphragm and the fixed substrate both adopting the sheet structure, after the pressure-sensitive diaphragm and the fixed substrate are combined into a ceramic core, the first lead area 9 on the pressure-sensitive diaphragm corresponds to the third lead area 11 on the fixed substrate, and the power supply end lead is plugged into it; the second lead area 10 on the pressure-sensitive diaphragm corresponds to the second lead area 10 on the fixed substrate, and the ground end lead is plugged into it; the third lead area 11 on the pressure-sensitive diaphragm corresponds to the first lead area 9 on the fixed substrate, and the capacitance test end lead is plugged into it.

[0022] The large shielding ring 6 is annular, and its shielding effectiveness is positively correlated with its ring thickness. However, due to the presence of the third lead section 11, when the outer diameter of the large shielding ring 6 is large, the outer edge of the large shielding ring 6 needs to avoid the third lead section 11. Accordingly, a clearance notch 12 is provided on the outer edge of the large shielding ring 6 at a location corresponding to the third lead section 11. Due to the presence of the clearance notch 12, the large shielding ring 6 can have a larger outer diameter without affecting the third lead section 11.

[0023] Specifically, the outer edge of the large shielding ring 6 is circular, and the relief notch 12 is arc-shaped. Since the lead occupies a position close to a circle when plugging in, the relief notch 12 is flared radially outward along the large shielding ring 6, achieving a better relief effect with a minimal relief notch 12.

[0024] Due to the existence of the avoidance gap 12, the shielding effect of the large shielding ring 6 at the avoidance gap 12 will be weakened. Therefore, a gap shielding ring 13 is provided at the avoidance gap 12 of the large shielding ring 6. The gap shielding ring 13 is correspondingly arranged on the outer peripheral side of the third lead position 11, so that the shielding effect at the avoidance gap 12 can be enhanced.

[0025] The first lead section 9 and the third lead section 11 are symmetrically arranged on either side of the second lead section 10, and the notched shielding ring 13, which is a mirror image of the second lead section 10, can surround the electrode lead point 5. Taking the example of a case where both the pressure-sensitive diaphragm and the fixed substrate adopt the aforementioned sheet structure, after the pressure-sensitive diaphragm and the fixed substrate are combined into a ceramic core, the notched shielding ring 13 on the pressure-sensitive diaphragm will surround the electrode lead point 5 on the fixed substrate. Correspondingly, the notched shielding ring 13 on the fixed substrate will also surround the electrode lead point 5 on the pressure-sensitive diaphragm. Therefore, the notched shielding ring 13 can also provide three-dimensional shielding for the electrode lead point 5 on the other sheet, thereby enhancing the shielding effect of the shielding gold layer 2.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A ceramic core sheet gold layer structure, characterized in that: The invention comprises a sheet body constituting a ceramic core body, wherein the sheet body has an electrode gold layer (1) and a shielding gold layer (2); the electrode gold layer (1) comprises an electrode body (3), an electrode lead wire (4) and an electrode lead point (5) connected in sequence; the shielding gold layer (2) comprises a large shielding ring (6) and a small shielding ring (7) connected to each other, the large shielding ring (6) being arranged around the outer periphery of the electrode body (3), and the small shielding ring (7) being arranged around the outer periphery of the electrode lead point (5); The connection between the large shielding ring (6) and the small shielding ring (7) forms a lead-out port (8), and the electrode lead wire (4) passes through the lead-out port (8); The large shielding ring (6) is separated from the electrode body (3) by a gap, the small shielding ring (7) is separated from the electrode lead point (5) by a gap, and the electrode lead wire (4) is separated from the lead outlet (8) by a gap, and the gap widths of the three are consistent.

2. The ceramic core sheet gold layer structure according to claim 1, characterized in that: The electrode lead-out point (5) has a first lead area (9), the small shielding ring (7) has a second lead area (10), the outer side of the large shielding ring (6) has a third lead area (11), the second lead area (10) is between the first lead area (9) and the third lead area (11), and an avoidance notch (12) is provided on the outer edge of the large shielding ring (6) at a position corresponding to the third lead area (11).

3. The ceramic core sheet gold layer structure according to claim 2, characterized in that: The outer edge of the large shielding ring (6) is circular, and the avoidance gap (12) is arc-shaped.

4. The ceramic core sheet gold layer structure according to claim 3, characterized in that: The avoidance notch (12) is flared radially outward along the large shielding ring (6).

5. The ceramic core sheet gold layer structure according to claim 2, characterized in that: A notch shielding ring (13) is provided at the avoidance notch (12) of the large shielding ring (6), and the notch shielding ring (13) is correspondingly arranged around the outer peripheral side of the third lead area (11).

6. The ceramic core sheet gold layer structure according to claim 5, characterized in that: The first lead area (9) and the third lead area (11) are symmetrically arranged on both sides of the second lead area (10), and the mirror image of the notch shielding ring (13) relative to the second lead area (10) can surround the electrode lead-out point (5).

7. The ceramic core sheet gold layer structure according to any one of claims 1 to 6, characterized in that: The sheet body is a pressure-sensitive diaphragm constituting a ceramic core.

8. The ceramic core sheet gold layer structure according to any one of claims 1 to 6, characterized in that: The sheet body is a fixed substrate constituting the ceramic core.

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