阅读说明：本技术 一种用于管式pecvd设备的石墨舟电极对接装置 (Graphite boat electrode butt joint device for tubular PECVD equipment ) 是由 王玉明 程海良 闫宝洁 曾俞衡 陈晖� 谢利华 李旺鹏 于 2019-09-20 设计创作，主要内容包括：本发明公开了一种用于管式PECVD设备的石墨舟电极对接装置,包括：长直状的电极杆,其由刚性导电材料制成；以及分别连接于所述电极杆两端的接电固定组件及电极头,其中,所述接电固定组件由刚性绝缘材料制成,所述接电固定组件安装于炉盖的外侧,从所述接电固定组件引出的电极杆穿过所述炉盖后沿着所述真空反应炉的轴线方向延伸至所述真空反应炉的内部。根据本发明,其相比原有的通过石墨舟角与陶瓷支撑杆上电极转接组件接触方式,可避免多个工艺周期后镀膜(绝缘膜)沉积于石墨舟角、电极转接组件接触区导致电极接触不良问题。(the invention discloses a graphite boat electrode butt joint device for a tubular PECVD device, which comprises: a long straight electrode rod made of a rigid conductive material; the electric connection fixing assembly is made of rigid insulating materials, the electric connection fixing assembly is installed on the outer side of the furnace cover, and the electrode rod led out from the electric connection fixing assembly penetrates through the furnace cover and then extends to the inside of the vacuum reaction furnace along the axial direction of the vacuum reaction furnace. According to the invention, compared with the original mode of contacting the graphite boat corner with the electrode switching component on the ceramic support rod, the problem of poor electrode contact caused by the deposition of a coating (insulating film) on the graphite boat corner and the electrode switching component contact area after a plurality of process cycles can be avoided.)

1. A graphite boat electrode docking assembly for a tubular PECVD apparatus, the tubular PECVD apparatus comprising:

The tubular vacuum reaction furnace (2) is hollow inside and has two open ends to form a left opening and a right opening;

Two furnace covers (1) respectively connected to the ends of the vacuum reaction furnace (2) to seal the left opening and the right opening; and

an insulating support frame (6) which is fixedly arranged in the vacuum reaction furnace (2) and is used for supporting the graphite boat (7),

Characterized in that, the graphite boat electrode butt joint device comprises:

A long straight electrode rod (3) made of a rigid conductive material; and

An electric connection fixed component (5) and an electrode tip (4) which are respectively connected with the two ends of the electrode rod (3),

the electric connection fixing component (5) is made of a rigid insulating material, the electric connection fixing component (5) is installed on the outer side of the furnace cover (1), and an electrode rod (3) led out from the electric connection fixing component (5) penetrates through the furnace cover (1) and then extends to the inside of the vacuum reaction furnace (2) along the axial direction of the vacuum reaction furnace (2).

2. the graphite boat electrode docking device for a tubular PECVD apparatus according to claim 1, wherein the electrode rod (3) is made of a 310S stainless steel material.

3. The graphite boat electrode docking device for a tubular PECVD apparatus according to claim 1, wherein the electrode head (4) comprises:

a fixed section (41), one end of which is detachably connected with the end part of the electrode rod (3); and

a conducting section (42) fixed to the other end of the fixing section (41),

the conducting section (42) is provided with at least one narrow groove (45) extending from the free end to the fixed end, and the narrow groove (45) penetrates through the conducting section (42) in the radial direction of the conducting section (42), so that the conducting section (42) is divided into at least two branches (44) by the narrow groove (45).

4. the graphite boat electrode docking device for a tubular PECVD apparatus as recited in claim 3, wherein the radial dimension of the fixed segment (41) is larger than the radial dimension of the conducting segment (42), wherein a tapered guide segment (43) is fixedly connected between the fixed segment (41) and the conducting segment (42), and the radial dimension of the tapered guide segment (43) is gradually contracted in the direction extending from the fixed segment (41) to the conducting segment (42).

5. The graphite boat electrode docking device for a tubular PECVD apparatus as recited in claim 3, wherein the outer periphery of the conducting section (42) is electroplated with a silver plating layer.

6. The graphite boat electrode docking device for a tubular PECVD apparatus according to claim 1, wherein the electrical fixture assembly (5) comprises:

an electrode connecting pipe (51) having one end fixedly installed at the outer side of the furnace cover (1), and having a hollow interior to form a connecting through hole (511) penetrating the electrode connecting pipe (51) in the axial direction;

an electrode mounting tube (52) coaxially fixed to the other end of the electrode connecting tube (51), having a hollow interior to form a mounting through-hole (521) penetrating the electrode mounting tube (52) in the axial direction,

the mounting through hole (521) is axially communicated with the connecting through hole (511), an insulating mounting sleeve (53) made of insulating materials is embedded in the mounting through hole (521), the insulating mounting sleeve (53) extends from the end face of the electrode mounting tube (52) to the connecting through hole (511), the end part of the electrode rod (3) is inserted into the insulating mounting sleeve (53) and is exposed from the mounting through hole (521) to form a wiring terminal, and the electrode rod (3) led out of the insulating mounting sleeve (53) penetrates through the furnace cover (1) through the connecting through hole (511) and then extends to the inside of the vacuum reaction furnace (2) along the axial direction of the vacuum reaction furnace (2).

7. The graphite boat electrode docking device for a tubular PECVD apparatus as recited in claim 6, wherein the inner diameter of the mounting through-hole (521) is smaller than the inner diameter of the coupling through-hole (511).

Technical Field

The invention relates to the field of solar cell deposition coating, in particular to a graphite boat electrode butt joint device for a tubular PECVD device.

background

according to measurement, the reflection loss rate of light on the surface of a solar cell is up to about 35%, in the field of solar cell deposition coating, a tubular PECVD (plasma enhanced chemical vapor deposition) device is usually adopted for depositing a silicon oxide anti-reflection film on the surface of the solar cell, the anti-reflection film can greatly improve the utilization rate of a cell piece to sunlight, and is beneficial to improving the photo-generated current density, so that the conversion efficiency is improved, meanwhile, the passivation of hydrogen in the film on the surface of the cell piece reduces the surface recombination rate of an emitter junction, reduces dark current, improves open-circuit voltage, improves the photoelectric conversion efficiency to reduce the reflection of the sunlight, and increases the absorption rate of the cell to sunlight.

The PECVD (Plasma Enhanced Chemical Vapor Deposition) is a Plasma Enhanced Chemical Vapor Deposition, and has the specific principle that gas glow discharge is excited by utilizing radio frequency power discharge to form Plasma, and under the action of an electromagnetic field, the decomposition, combination, excitation and ionization of process gas molecules are promoted, the generation of reactive groups is accelerated, the Deposition temperature of a film is reduced, and the film coating function is realized. Specifically, a battery piece to be coated is placed between two adjacent electrode plates of the graphite boat, the two adjacent electrode plates are separated and supported through an insulating ceramic spacer bush, and electrode rods of a positive motor and a negative motor of a radio frequency power supply are inserted into two electrode holes in corresponding positions of the graphite boat, so that an electric field can be formed between the two adjacent electrode plates on the graphite boat, and discharging is achieved.

The specific operation flow of the preparation work to be completed before PECVD coating is as follows: pushing the graphite boat carrying the battery piece into a vacuum reaction furnace, guiding the electrode rod to be inserted into the electrode introducing hole of the graphite boat so as to realize the electric connection between the electrode rod and the graphite boat, then enabling the graphite boat to fall on the insulating support frame, sealing the vacuum reaction furnace and vacuumizing, and thus completing the preparation work before PECVD coating.

In the process of researching and improving the quality of a deposition coating film by a PECVD method, the inventor finds that the electrode rod in the prior art has at least the following problems:

The conventional graphite boat electrical connection mode is that the graphite boat is conducted with an electrode adapter assembly on an insulating support frame, and a coating layer (insulating film) is deposited on a contact area between a graphite boat corner and the electrode adapter assembly after a plurality of coating process periods, so that the problems of poor electrical contact, even open circuit of electrical connection and the like are caused, and finally PECVD coating failure is caused.

In view of the above, it is necessary to develop a graphite boat electrode docking device for a tubular PECVD apparatus to solve the above problems.

Disclosure of Invention

aiming at the defects in the prior art, the invention mainly aims to provide the graphite boat electrode butt joint device for the tubular PECVD equipment, which can avoid the problem of poor electrode contact caused by the deposition of a plating film (insulating film) on the graphite boat corner and an electrode switching component contact area after a plurality of process periods compared with the original contact mode of the graphite boat corner and the electrode switching component on the ceramic supporting rod.

to achieve the above objects and other advantages in accordance with the present invention, there is provided a graphite boat electrode docking apparatus for a tubular PECVD apparatus, the tubular PECVD apparatus comprising:

the tubular vacuum reaction furnace is hollow and has two open ends to form a left opening and a right opening;

the two furnace covers are respectively connected to the end parts of the vacuum reaction furnace to seal the left opening and the right opening; and

An insulating support frame which is fixedly arranged in the vacuum reaction furnace and is used for supporting the graphite boat,

Graphite boat electrode interfacing apparatus includes:

a long straight electrode rod made of a rigid conductive material; and

an electric fixed assembly and an electrode tip which are respectively connected with the two ends of the electrode rod,

the electric connection fixing component is arranged on the outer side of the furnace cover, and an electrode rod led out from the electric connection fixing component penetrates through the furnace cover and then extends into the vacuum reaction furnace along the axial direction of the vacuum reaction furnace.

Optionally, the electrode rod is made of a 310S stainless steel material.

Optionally, the electrode head comprises:

One end of the fixed section is detachably connected with the end part of the electrode rod; and

a conducting section fixed at the other end of the fixing section,

the conduction section is provided with at least one thin groove which extends from a free end to a fixed end of the conduction section, and the thin groove penetrates through the conduction section in the radial direction of the conduction section, so that the conduction section is divided into at least two branches by the thin groove.

Optionally, the radial dimension of the fixed segment is greater than the radial dimension of the conducting segment, wherein a tapered guiding segment is fixedly connected between the fixed segment and the conducting segment, and the radial dimension of the tapered guiding segment gradually shrinks in a direction from the fixed segment to the conducting segment.

Optionally, the periphery of the conducting section is plated with a silver plating layer.

Optionally, the power connection fixing assembly includes:

One end of the electrode connecting pipe is fixedly arranged on the outer side of the furnace cover, and the inside of the electrode connecting pipe is hollow so as to form a connecting through hole which penetrates through the electrode connecting pipe in the axis direction;

an electrode mounting tube coaxially and fixedly connected with the other end of the electrode connecting tube, the interior of the electrode mounting tube is hollow so as to form a mounting through hole which penetrates through the electrode mounting tube in the axial direction,

The mounting through hole is axially communicated with the connecting through hole, an insulating mounting sleeve made of insulating materials is embedded in the mounting through hole, the insulating mounting sleeve extends into the connecting through hole from the end face of the electrode mounting tube, the end part of the electrode rod is inserted into the insulating mounting sleeve and is exposed out of the mounting through hole to form a wiring terminal, and the electrode rod led out from the insulating mounting sleeve passes through the furnace cover through the connecting through hole and then extends into the vacuum reaction furnace along the axial direction of the vacuum reaction furnace.

optionally, the inner diameter of the mounting through hole is smaller than the inner diameter of the connecting through hole.

One of the above technical solutions has the following advantages or beneficial effects: compared with the original contact mode of the graphite boat corner and the electrode switching component on the ceramic support rod, the problem of poor electrode contact caused by the fact that a coating film (insulating film) is deposited in the contact area of the graphite boat corner and the electrode switching component after a plurality of process periods can be solved.

drawings

fig. 1 is a longitudinal sectional view of a tubular PECVD apparatus to which the graphite boat electrode docking device according to one embodiment of the present invention is applied;

FIG. 2 is a front view of a graphite boat electrode docking assembly for a tubular PECVD apparatus according to one embodiment of the present invention;

FIG. 3 is a left side view of a graphite boat electrode docking assembly for a tubular PECVD apparatus according to one embodiment of the present invention;

FIG. 4 is a right side view of a graphite boat electrode docking assembly for a tubular PECVD apparatus according to one embodiment of the present invention;

fig. 5 is a longitudinal sectional view of a graphite boat electrode docking device for a tubular PECVD apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

in the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.

in the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.

terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

according to an embodiment of the present invention, with reference to the illustrations of fig. 1 and fig. 2, it can be seen that the graphite boat electrode docking apparatus for the tubular PECVD apparatus comprises:

Fig. 1 shows a longitudinal sectional view of a tubular PECVD apparatus to which the graphite boat electrode docking apparatus according to an embodiment of the present invention is applied, and it can be seen from the illustrations of fig. 1 and 2 that the tubular PECVD apparatus includes:

A tubular vacuum reaction furnace 2 which is hollow and has two open ends to form a left opening and a right opening;

two furnace covers 1 respectively connected to the ends of the vacuum reaction furnace 2 to seal the left opening and the right opening; and

an insulating support frame 6 which is fixedly arranged in the vacuum reaction furnace 2 and is used for supporting a graphite boat 7,

graphite boat electrode interfacing apparatus includes:

an elongated straight electrode rod 3 made of a rigid conductive material; and

An electric connection fixed component 5 and an electrode tip 4 which are respectively connected with the two ends of the electrode rod 3,

the electric connection fixing component 5 is made of a rigid insulating material, the electric connection fixing component 5 is installed on the outer side of the furnace cover 1, and the electrode rod 3 led out from the electric connection fixing component 5 penetrates through the furnace cover 1 and then extends to the inside of the vacuum reaction furnace 2 along the axial direction of the vacuum reaction furnace 2.

in the present embodiment, the electrode rod 3 is made of a 310S stainless steel material.

Reference will now be made to fig. 2 and 4, in which a further configuration of the electrode head 4 is shown in detail, said electrode head 4 comprising:

a fixed section 41, one end of which is detachably connected with the end of the electrode rod 3; and

A conducting section 42 fixed to the other end of the fixing section 41,

The conducting section 42 is provided with at least one narrow groove 45 extending from a free end to a fixed end thereof, and the narrow groove 45 penetrates through the conducting section 42 in a radial direction of the conducting section 42, so that the conducting section 42 is divided into at least two branches 44 by the narrow groove 45. Due to the existence of the fine groove 45, the fork 44 can generate corresponding radial restoring force after being pressed by radial extrusion, usually, the radial size of the conducting section 42 is set to be slightly larger than that of the graphite boat electrode introducing hole, after the conducting section 42 is connected into the graphite boat electrode introducing hole, the fork 44 of the conducting section 42 can generate corresponding radial restoring force by the pressing and pressing of the graphite boat electrode hole, under the action of the self radial restoring force of the conducting section 42, the close contact type connection with the graphite boat electrode introducing hole can be realized, the problem that the electrode rod and the graphite boat electrode introducing hole are loosened or even slip from the graphite boat electrode introducing hole is solved, the problem that the electrode rod and the graphite boat electrode are in poor contact or even the electric path is broken is solved, and the smooth proceeding of the PECVD film coating process is ensured. In the present embodiment, two narrow grooves 45 are provided and intersect each other in a cross shape, and accordingly, the conducting segment 42 is divided into 4 branches by the narrow grooves 45.

Further, a radial dimension of the fixed segment 41 is greater than a radial dimension of the conducting segment 42, wherein a tapered guiding segment 43 is fixedly connected between the fixed segment 41 and the conducting segment 42, and a radial dimension of the tapered guiding segment 43 gradually shrinks in a direction extending from the fixed segment 41 to the conducting segment 42.

further, the outer periphery of the conduction section 42 is plated with a silver plating layer. The silver coating can ensure the good contact between the electrode lead-in hole of the graphite boat and the electrode head in the boat falling state.

Referring now to fig. 3 and 5, the electrical fixture assembly 5 comprises:

An electrode connection tube 51 having one end fixedly installed at an outer side of the furnace cover 1, and having a hollow interior to form a connection through hole 511 penetrating the electrode connection tube 51 in an axial direction;

an electrode mounting tube 52 coaxially fixed to the other end of the electrode connecting tube 51, having a hollow interior to form a mounting through-hole 521 penetrating the electrode mounting tube 52 in the axial direction,

The mounting through hole 521 is axially communicated with the connecting through hole 511, an insulating mounting sleeve 53 made of an insulating material is embedded in the mounting through hole 521, the insulating mounting sleeve 53 extends from the end surface of the electrode mounting tube 52 to the connecting through hole 511, the end part of the electrode rod 3 is inserted into the insulating mounting sleeve 53 and is exposed from the mounting through hole 521 to form a terminal, and the electrode rod 3 led out of the insulating mounting sleeve 53 passes through the furnace cover 1 through the connecting through hole 511 and then extends to the inside of the vacuum reaction furnace 2 along the axial direction of the vacuum reaction furnace 2.

Further, the inner diameter of the mounting through-hole 521 is smaller than that of the connection through-hole 511. In the embodiment, the descending height of the graphite boat from the upper position to the boat falling insulating support 6 is 1.363cm, which is equivalent to the deflection bending deformation of about 1.363cm of the electrode tip at the front end of the electrode rod 3, and the electrode rod 3 made of the high temperature resistant 310s stainless steel material is completely in the elastic deformation range of the electrode rod 3, and plastic deformation (permanent deformation) does not occur, so that after the graphite boat is removed from the reaction furnace after film coating is completed, the electrode rod 3 can recover the straight state, the smooth butt joint with the electrode introducing hole of the graphite boat is ensured next time, and the reliability of the equipment is ensured.

compared with the original contact mode of the graphite boat corner and the electrode switching component on the ceramic support rod, the direct electrode butt joint mode can avoid the problem of poor electrode contact caused by the deposition of a coating (insulating film) on the contact area of the graphite boat corner and the electrode switching component after a plurality of process periods.

the number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.