阅读说明：本技术 基于辅助沉积的膜层改性方法及系统 (Film modification method and system based on auxiliary deposition ) 是由 郭腾 倪俊 景加荣 李灿伦 范秋林 李辉 乔宏 祁松松 于 2019-11-13 设计创作，主要内容包括：本发明提供了一种基于辅助沉积的膜层改性方法及系统,包括：预处理步骤：在沉积Ag膜之前,对玻璃基底采用离子源清洗；辅助沉积步骤：在沉积Ag膜过程中,通过调节所述离子源的功率、工作气体通量以及公自转速度来改变到达玻璃基底表面的离子能量和离子密度。本发明的膜层改性方法和系统可用于提高玻璃基底表面原子活性,消除结合不牢的沉积原子,促进表面原子移动与扩散,扩展玻璃基底与Ag的共混层,最终达到提高Ag膜致密度及其与玻璃基底附着力的目的。(The invention provides a film modification method and system based on auxiliary deposition, which comprises the following steps: a pretreatment step: before depositing an Ag film, cleaning a glass substrate by adopting an ion source; auxiliary deposition step: during the deposition of the Ag film, the ion energy and ion density reaching the surface of the glass substrate are changed by adjusting the power of the ion source, the flux of the working gas, and the revolution and rotation speed. The film layer modification method and the film layer modification system can be used for improving the surface atomic activity of the glass substrate, eliminating the deposition atoms which are not firmly combined, promoting the movement and the diffusion of the surface atoms, expanding the blending layer of the glass substrate and Ag and finally achieving the purposes of improving the density of the Ag film and the adhesive force of the Ag film and the glass substrate.)

1. A film modification method based on auxiliary deposition is characterized by comprising the following steps:

a pretreatment step: before depositing an Ag film, cleaning a glass substrate by adopting an ion source;

auxiliary deposition step: during the deposition of the Ag film, the ion energy and ion density reaching the surface of the glass substrate are changed by adjusting the power of the ion source, the flux of the working gas, and the revolution and rotation speed.

2. The method of claim 1, wherein the ion source comprises an rf-inductively coupled ion source.

3. The method for modifying a film layer based on auxiliary deposition as claimed in claim 2, wherein the transmitting antenna of the rf-inductively coupled ion source is wound outside an electrically insulated quartz discharge chamber, when rf power is applied to the transmitting antenna through a matching network, rf current passes through the transmitting antenna, rf magnetic flux is generated, and an rf electric field is induced in the quartz discharge chamber along an axial direction, electrons in the quartz discharge chamber are accelerated by the rf electric field, thereby generating plasma, and energy of the transmitting antenna is coupled into the plasma.

4. The auxiliary deposition-based film modifying method of claim 1, wherein in the auxiliary deposition step, the deposition particles are bombarded by particles from the ion source, one part is reversely sputtered off the surface of the glass substrate, and the other part is accelerated.

5. The auxiliary deposition-based film layer modification method of claim 4, wherein the process of accelerating the deposition particles comprises:

A. sputtering atoms on the surface of the glass substrate;

B. momentum is transferred from the incident ions to the deposited particles that reach the glass substrate;

C. the deposition particles fill the cavities created by the ion bombardment;

D. the deposited particles not only move along the plane of the glass substrate due to the uninterrupted momentum transfer, but also move up and down with momentum perpendicular to the surface of the glass substrate.

6. An auxiliary deposition-based film layer modification system, comprising:

a preprocessing module: before depositing an Ag film, cleaning a glass substrate by adopting an ion source;

an auxiliary deposition module: during the deposition of the Ag film, the ion energy and ion density reaching the surface of the glass substrate are changed by adjusting the power of the ion source, the flux of the working gas, and the revolution and rotation speed.

7. The system of claim 6, wherein the ion source comprises an RF-inductively coupled ion source.

8. The system for modifying a film according to claim 7, wherein the transmitting antenna of the rf-inductively coupled ion source is wound outside an electrically insulated quartz discharge chamber, when rf power is applied to the transmitting antenna through a matching network, rf current passes through the transmitting antenna, rf magnetic flux is generated, and an rf electric field is induced in the quartz discharge chamber along an axial direction, electrons in the quartz discharge chamber are accelerated by the rf electric field, thereby generating plasma, and energy of the transmitting antenna is coupled into the plasma.

9. The system of claim 6, wherein in the auxiliary deposition step, the deposition particles are bombarded by particles from the ion source, one part is back-sputtered off the glass substrate surface, and the other part is accelerated.

10. The system of claim 9, wherein the process of accelerating the deposition particles comprises:

A. sputtering atoms on the surface of the glass substrate;

B. momentum is transferred from the incident ions to the deposited particles that reach the glass substrate;

C. the deposition particles fill the cavities created by the ion bombardment;

D. the deposited particles not only move along the plane of the glass substrate due to the uninterrupted momentum transfer, but also move up and down with momentum perpendicular to the surface of the glass substrate.

Technical Field

The invention relates to the technical field of magnetron sputtering, in particular to a film layer modification method and system based on auxiliary deposition.

Background

The basic principle of magnetron sputtering is that electrons collide with argon atoms in the process of flying to a substrate under the action of an electric field E, so that the argon atoms are ionized to generate argon positive ions and new electrons, the new electrons fly to the substrate, the Ar positive ions accelerate to fly to a cathode target under the action of the electric field, and bombard the surface of the target at high energy, so that the target is sputtered. In the sputtering particles, neutral target atoms or molecules are deposited on a substrate to form a film, and generated secondary electrons are subjected to the action of an electric field and a magnetic field to do circular motion on the surface of the target in an approximately cycloid form, so that the motion trail of the electrons is prolonged, the ionization rate of the electrons to working gas is improved, and the energy of the electrons is effectively reduced. Magnetron sputtering can be used for depositing various materials such as metal, semiconductor, insulator and the like, has the advantages of high speed, low temperature and low damage, is beneficial to obtaining a uniform and compact film layer with excellent combination, and is widely and successfully applied to many aspects, especially in microelectronics, optical films and semiconductor industries.

Ag is widely noticed due to its excellent optical properties and its applications, among metal materials, it has the highest reflectivity to visible light and infrared light (the emission ratio to visible light is up to 0.95, and the reflection ratio to infrared light is up to 0.99), good neutrality, and the smallest polarization effect, so it is an important optical material in the visible and near-infrared regions. In addition, the Ag film has the advantages of fast electron conduction, small resistivity, easy preparation and the like, and has wide application in the aspects of microelectronic devices, optoelectronic devices and solar energy utilization, such as Liquid Crystal Display (LCD), Plasma Display Panel (PDP) and Vacuum Fluorescent Display (VFD), defrosters of automobile windshields and antennas for receiving radio waves, and the Ag conductive film is formed on a glass substrate.

Patent document CN 109837517a discloses a method for preparing an external reflection silver film based on magnetron sputtering, which is characterized in that the Ag film has poor adhesion with a glass substrate, is easy to fall off, and if the film layer is loose, the film layer is easy to oxidize, which greatly affects the optical performance of the Ag film, and yellow spots and cracks are easy to appear during the process of storing and pasting a glass cover plate, which affects the stability and the service life of the glass cover plate. Therefore, how to enhance the compactness of the film layer and the adhesion of the film layer to the substrate is a very much concerned and solved problem.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a film modification method and system based on auxiliary deposition.

The invention provides a film modification method based on auxiliary deposition, which comprises the following steps:

a pretreatment step: before depositing an Ag film, cleaning a glass substrate by adopting an ion source;

auxiliary deposition step: during the deposition of the Ag film, the ion energy and ion density reaching the surface of the glass substrate are changed by adjusting the power of the ion source, the flux of the working gas, and the revolution and rotation speed.

Preferably, the ion source comprises a radio frequency-inductively coupled ion source.

Preferably, the transmitting antenna of the rf-inductively coupled ion source is wound outside an electrically insulated quartz discharge chamber, when rf power is applied to the transmitting antenna through a matching network, rf current passes through the transmitting antenna, rf magnetic flux is generated, and an rf electric field is induced in the quartz discharge chamber along an axial direction, electrons in the quartz discharge chamber are accelerated by the rf electric field, thereby generating plasma, and energy of the transmitting antenna is coupled into the plasma.

Preferably, in the auxiliary deposition step, the deposition particles are bombarded by particles from the ion source, one part is reversely sputtered away from the surface of the glass substrate, and the other part is accelerated.

Preferably, the process of accelerating the deposition particles comprises:

A. sputtering atoms on the surface of the glass substrate;

B. momentum is transferred from the incident ions to the deposited particles that reach the glass substrate;

C. the deposition particles fill the cavities created by the ion bombardment;

D. the deposited particles not only move along the plane of the glass substrate due to the uninterrupted momentum transfer, but also move up and down with momentum perpendicular to the surface of the glass substrate.

The invention provides a film layer modification system based on auxiliary deposition, which comprises:

a preprocessing module: before depositing an Ag film, cleaning a glass substrate by adopting an ion source;

an auxiliary deposition module: during the deposition of the Ag film, the ion energy and ion density reaching the surface of the glass substrate are changed by adjusting the power of the ion source, the flux of the working gas, and the revolution and rotation speed.

Preferably, the ion source comprises a radio frequency-inductively coupled ion source.

Preferably, the transmitting antenna of the rf-inductively coupled ion source is wound outside an electrically insulated quartz discharge chamber, when rf power is applied to the transmitting antenna through a matching network, rf current passes through the transmitting antenna, rf magnetic flux is generated, and an rf electric field is induced in the quartz discharge chamber along an axial direction, electrons in the quartz discharge chamber are accelerated by the rf electric field, thereby generating plasma, and energy of the transmitting antenna is coupled into the plasma.

Preferably, in the auxiliary deposition step, the deposition particles are bombarded by particles from the ion source, one part is reversely sputtered away from the surface of the glass substrate, and the other part is accelerated.

Preferably, the process of accelerating the deposition particles comprises:

A. sputtering atoms on the surface of the glass substrate;

B. momentum is transferred from the incident ions to the deposited particles that reach the glass substrate;

C. the deposition particles fill the cavities created by the ion bombardment;

D. the deposited particles not only move along the plane of the glass substrate due to the uninterrupted momentum transfer, but also move up and down with momentum perpendicular to the surface of the glass substrate.

Compared with the prior art, the invention has the following beneficial effects:

the film layer modification method and the film layer modification system can be used for improving the surface atomic activity of the glass substrate, eliminating the deposition atoms which are not firmly combined, promoting the movement and the diffusion of the surface atoms, expanding the blending layer of the glass substrate and Ag and finally achieving the purposes of improving the density of the Ag film and the adhesive force of the Ag film and the glass substrate.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a flow chart of the operation of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1, the method for modifying a film based on assisted deposition provided by the present invention includes:

a pretreatment step: before depositing an Ag film, cleaning a glass substrate by adopting an ion source;

auxiliary deposition step: in the process of depositing the Ag film, the ion energy and the ion density reaching the surface of the glass substrate are changed by adjusting the power of an ion source, the flux of working gas and the revolution and rotation speed, so as to achieve the aim of assisting in depositing the film layer.

The ion source comprises a radio frequency-inductively coupled ion source, a transmitting antenna of the radio frequency-inductively coupled ion source is wound outside an electrically insulated quartz discharge chamber, when radio frequency power is applied to the transmitting antenna through a matching network, radio frequency current passes through the transmitting antenna to generate radio frequency magnetic flux, an outgoing radio frequency electric field is induced in the quartz discharge chamber along the axial direction, electrons in the quartz discharge chamber are accelerated by the radio frequency electric field to generate plasma, and meanwhile, the energy of the transmitting antenna is coupled into the plasma. The radio frequency-induction coupling ion source has the advantages that on one hand, a water-cooled spiral radio frequency coil is arranged outside the quartz discharge chamber, low-energy electrons do spiral line motion along the direction parallel to the wall of the discharge chamber and are accelerated by an induction coupling electric field, so that the electron loss is reduced, the ionization probability is increased, on the other hand, gas is introduced into the discharge chamber by the quartz diffuser along the circumferential direction, as the ion beam current density is directly proportional to the plasma density and the electron temperature root mean square, according to the spiral radio frequency coil and the radio frequency skin effect, electrons with higher temperature are distributed at the periphery of the wall of the discharge chamber, the reduction of the plasma density at the wall of the discharge chamber is compensated, and the collimation and.

The process of ion assisted deposition is: the sputtered particles are continuously bombarded by ions from the ion source, causing a portion of the very low energy deposited particles to be sputtered away from the glass substrate surface, and another portion of the deposited particles to be accelerated, and to gain more momentum and sufficient kinetic energy, thereby increasing the mobility of the adsorbed atoms. The process of accelerating the deposition particles further comprises:

A. sputtering atoms on the surface of the glass substrate;

B. momentum is transferred from the incident ions to the deposited particles that reach the glass substrate;

C. the deposition particles fill the cavities created by the ion bombardment;

D. the deposited particles not only move along the plane of the glass substrate due to the uninterrupted momentum transfer, but also move up and down with momentum perpendicular to the surface of the glass substrate.

The verification test result shows that: the energy transfer of the incident ions causes three-dimensional motion of the deposited particles, which can greatly improve the performance of the Ag film. The preparation method can not only obviously expand the blending layer of the substrate and the Ag film, improve the density of the Ag film, improve the adhesive force of the Ag film and the substrate, but also be beneficial to improving the optical performance of the Ag film. However, there is also data and experimental results that indicate that ion assisted deposition has a critical point for improving Ag film performance beyond which performance is degraded.

On the basis of the film modification method based on auxiliary deposition, the invention also provides a film modification system based on auxiliary deposition, which comprises the following steps:

a preprocessing module: before depositing an Ag film, cleaning a glass substrate by adopting an ion source;

an auxiliary deposition module: in depositing the Ag film, the ion energy and ion density reaching the surface of the glass substrate are changed by adjusting the power of the ion source, the flux of the working gas, and the revolution and rotation speed.

Those skilled in the art will appreciate that, in addition to implementing the system and its various devices, modules, units provided by the present invention as pure computer readable program code, the system and its various devices, modules, units provided by the present invention can be fully implemented by logically programming method steps in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system and various devices, modules and units thereof provided by the invention can be regarded as a hardware component, and the devices, modules and units included in the system for realizing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.