A ceramic housing for a multiphase optocoupler

Abstract

The application provides a ceramic housing for a multi-channel photoelectric coupler, comprising a ceramic base, a sealing ring and a cover plate, the ceramic base is connected to the cover plate through the sealing ring, a plurality of cavities are arranged in the ceramic base, the number of the cavities is equal to the number of channels of the photoelectric coupler; a first bonding area, a second bonding area, a third bonding area and a fourth bonding area are arranged in each cavity, the first bonding areas of each cavity are connected in parallel, and the second bonding areas of each cavity are connected in parallel, so that the pins of the ceramic housing are reduced, and the volume of the ceramic housing is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic packaging, and particularly relates to a ceramic shell for a multi-channel photoelectric coupler. BACKGROUND

[0002] The existing multi-channel photoelectric couplers, such as two-channel, four-channel and six-channel photoelectric couplers, are packaged by plastic (such as PSOP8, PSOP16, PSOP24, etc.) or ceramic (such as CSOP8, CSOP16, CSOP24, etc.), and the input electrical signals drive the light-emitting diodes to emit light of a certain wavelength, which is received by the photoelectric transistors to generate current and is amplified to be output, so as to realize the isolation of input and output electrical signals. At present, the multi-channel photoelectric couplers packaged by ceramic are arranged in a side-by-side manner, which uses more pins and has a larger volume of the entire ceramic shell package. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a ceramic shell for a multi-channel photoelectric coupler, which reduces the pins of the ceramic shell and greatly reduces the volume of the ceramic shell.

[0004] The present application is implemented as follows: a ceramic shell for a multi-channel photoelectric coupler, comprising a ceramic base, a sealing ring and a cover plate, the ceramic base is connected to the cover plate through the sealing ring, a plurality of cavities are arranged in the ceramic base, the number of the cavities is equal to the number of channels of the photoelectric coupler; a first bonding area, a second bonding area, a third bonding area and a fourth bonding area are arranged in each cavity, the first bonding areas of each cavity are connected in parallel, and the second bonding areas of each cavity are connected in parallel.

[0005] The present application has the following advantages: the ceramic shell for a multi-channel photoelectric coupler reduces the number of pins by connecting the internal bonding areas in parallel and sharing the referenced pins, and the volume of the entire ceramic shell is greatly reduced by two-row connection, for example, the volume of the ceramic shell can be reduced by 40% for four photoelectric couplers. BRIEF DESCRIPTION OF DRAWINGS

[0006] The present application will be further described below with reference to the embodiments and the accompanying drawings.

[0007] Figure 1 is a top view of a ceramic base of a multi-channel photoelectric coupler ceramic shell of the present application;

[0008] Figure 2 is Figure 1 A-A sectional view in figure

[0009] Figure 3 is Figure 1 B-B sectional view in figure

[0010] Figure 4 is a bottom view of a ceramic base of a ceramic housing of a multi-channel photoelectric coupler according to the present application;

[0011] Figure 5 is a schematic view of a cover plate of a ceramic housing of a multi-channel photoelectric coupler according to the present application. DETAILED DESCRIPTION

[0012] Referring to Figures 1 to 5 the present application provides a ceramic housing for a multi-channel photoelectric coupler, which comprises a ceramic base 1, a sealing ring (not shown in the figure) and a cover plate 2, the ceramic base 1 is connected to the cover plate 2 through the sealing ring, a plurality of cavities 11 are arranged in the ceramic base 1, the number of the cavities 11 is equal to the number of channels of the photoelectric coupler (not shown in the figure); a first bonding area 111, a second bonding area 112, a third bonding area 113 and a fourth bonding area 114 are arranged in each cavity 11, the first bonding areas 111 of each cavity 11 are connected in parallel, and the second bonding areas 112 of each cavity 11 are connected in parallel.

[0013] The ceramic base 1 further comprises two first external leads 12, the first bonding areas 111 of each cavity are connected in parallel and then connected to the two first external leads 12 respectively; the ceramic base 1 further comprises two second external leads 13, the second bonding areas 112 of each cavity are connected in parallel and then connected to the two second external leads 13 respectively; a plurality of third leads 16 are arranged on the ceramic base 1, the third leads 16 are connected to the third bonding areas 113 and the fourth bonding areas 114 in the cavities 11 one by one, and are used for controlling the photoelectric coupler; the ceramic housing is more stable through the two first leads 12 and the two second leads 13, and can still operate if one of the leads is damaged.

[0014] The first bonding areas 111 are arranged at the bottom of the cavities 11; a first protruding part 115, a second protruding part 116 and a third protruding part 117 are arranged in each cavity 11, the second bonding areas 112 are arranged on the first protruding parts 115, the third bonding areas 113 are arranged on the second protruding parts 116, and the fourth bonding areas 114 are arranged on the third protruding parts 117; the first bonding areas 111, the second bonding areas 112, the third bonding areas 113 and the fourth bonding areas 114 are separated by the first protruding parts 115, the second protruding parts 116 and the third protruding parts 117, so that the circuit will not be short-circuited, and the stable operation is ensured.

[0015] The ceramic base 1 is provided with at least one longitudinal partition plate 14 and at least two transverse partition plates 15, the transverse partition plates 15 and the longitudinal partition plate 14 divide the ceramic base 1 into multiple cavities 11; the bottom of the longitudinal partition plate 14 is connected to the ceramic base 1, the top of the longitudinal partition plate 14 is connected to the cover plate 2, the height of the transverse partition plate 15 is less than the height of the longitudinal partition plate 14, facilitating wiring and use between two cavities 11; after being isolated by the transverse partition plate 15 and the longitudinal partition plate 14, the photoelectric couplers in each cavity will not interfere with each other.

[0016] For example, when four cavities 11 are arranged, one longitudinal partition plate 14 and two transverse partition plates 15 can be used to form a cross shape, and then the pins in the cavities are shared, so that only 12 pins (originally 16 pins) are needed, and the volume of the entire ceramic shell will be reduced to 60% of the original.

[0017] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0018] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the specific examples described are only illustrative, and are not intended to limit the scope of the present application, and equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present application should be covered within the scope of the claims of the present application.

Claims

1. A ceramic housing for a multi-channel photocoupler comprising a ceramic base, a seal ring, and a cover plate, the ceramic base being connected to the cover plate by the seal ring, characterized in that: The ceramic base is internally provided with a plurality of cavities, the number of the cavities is equal to the number of channels of the optoelectronic coupler; each of the cavities is internally provided with a first bonding area, a second bonding area, a third bonding area and a fourth bonding area, the first bonding areas of each of the cavities are connected in parallel, the second bonding areas of each of the cavities are connected in parallel; The first bonding area is arranged at the bottom of the cavity; each of the cavities is internally provided with a first protruding part, a second protruding part and a third protruding part, the first protruding part, the second protruding part and the third protruding part are located above the first bonding area, the second bonding area is arranged above the first protruding part, the third bonding area is arranged above the second protruding part, the fourth bonding area is arranged above the third protruding part, the first bonding area, the second bonding area, the third bonding area and the fourth bonding area are separated by the first protruding part, the second protruding part and the third protruding part.

2. A ceramic housing for a multiphase opto-coupler as defined in claim 1, wherein: It also includes two first external leads, the first bonding areas of each of the cavities are connected to two first external leads in parallel.

3. A ceramic housing for a multiphase opto-coupler as defined in claim 1, wherein: It also includes two second external leads, the second bonding areas of each of the cavities are connected to two second external leads in parallel.

4. A ceramic housing for a multiphase opto-coupler as defined in claim 1, wherein: The ceramic base is internally provided with at least one longitudinal isolation plate and at least two transverse isolation plates, the transverse isolation plates and the longitudinal isolation plates separate the ceramic base to form a plurality of cavities; the bottom of the longitudinal isolation plate is connected to the ceramic base, the top of the longitudinal isolation plate is connected to the cover plate, the height of the transverse isolation plate is less than the height of the longitudinal isolation plate.

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