CN-119002188-B - Random metal texture manufacturing method for free curved surface

CN119002188BCN 119002188 BCN119002188 BCN 119002188BCN-119002188-B

Abstract

The application relates to a free-form surface random metal texture manufacturing method, which comprises the steps of forming a film on a water-drop-shaped free-form surface substrate after ultrasonic cleaning to coat photoresist, determining pre-texture pattern information, obtaining visual image information of the water-drop-shaped free-form surface substrate after baking and fixing the photoresist, analyzing the visual image information and the pre-texture pattern information, determining a laser motion track, wherein the laser motion track is used for controlling laser to perform exposure operation on the water-drop-shaped free-form surface substrate after baking and fixing the photoresist according to the pre-texture pattern information, developing the exposed water-drop-shaped free-form surface substrate, performing vacuum evaporation coating on the developed water-drop-shaped free-form surface substrate, performing photoresist stripping on the coated water-drop-shaped free-form surface substrate, and utilizing a high-precision visual system and a pre-programmed space outward-expansion curved surface track to ensure accurate exposure of the laser according to the pre-texture pattern information, so that deviation problems caused by insufficient repetition precision are reduced.

Inventors

Kang Zhongchun
YI ZHIMING
XU WEI
ZHOU ZHIQIANG

Assignees

东莞市光纳光电科技有限公司

Dates

Publication Date: 20260512
Application Date: 20240826

Claims (6)

1. The method for manufacturing the random metal textures of the free curved surface is characterized by comprising the following steps of: s11, cleaning the water drop-shaped free-form surface substrate by ultrasonic waves, S12, forming a film on the water-drop-shaped free-form surface substrate cleaned by ultrasonic waves to coat photoresist; s13, baking the film-forming water-drop-shaped free-form surface substrate coated with the photoresist for fixing the photoresist; S14, determining pre-texture pattern information, acquiring visual image information of a water-drop-shaped free-form surface substrate after baking and curing according to the pre-texture pattern information, analyzing the visual image information and the pre-texture pattern information, and determining a laser motion track, wherein the laser motion track is used for controlling laser to perform exposure operation on the water-drop-shaped free-form surface substrate after baking and curing according to the pre-texture pattern information; s15, developing the exposed water-drop-shaped free-form surface substrate; S16, carrying out vacuum evaporation coating on the developed water-drop-shaped free-form surface substrate; s17, de-gluing the water-drop-shaped free-form surface substrate after coating; s18, cleaning the de-glued water-drop-shaped free-form surface substrate by ultrasonic waves; S19, transferring the cleaned and de-glued water-drop-shaped free-form surface substrate to a projection optical imager for texture measurement; in the step S12, the ultrasonic coating mechanism is used for performing film forming coating on the water drop-shaped freeform surface substrate after ultrasonic cleaning, the ultrasonic coating mechanism comprises a control box (1), a first motion system (2), a profiling heating base (3) and a support frame (4) which are positioned on the control box (1), an ultrasonic spray head (5) is arranged on the first motion system (2), and a visual system is arranged on the support frame (4); Step 12 further comprises the steps of: acquiring a motion coordinate system of the water-drop-shaped free-form surface substrate based on a visual system; determining a preset three-dimensional track; According to the preset three-dimensional track and the motion coordinate system, a first motion system (2) is controlled to carry out coating operation on a water drop-shaped free-form surface substrate positioned in the profiling heating base (3); the profiling heating base (3) is provided with controllable heating flexible cloth, and before executing the step S12, the profiling heating base further comprises the following steps: judging whether the temperature parameter of the controllable heating flexible cloth reaches a preset threshold value or not; if yes, pushing a first window for prompting to start the ultrasonic coating mechanism to carry out photoresist film forming coating; If not, pushing a second window for prompting that the condition of starting the ultrasonic coating mechanism to carry out photoresist film forming coating is not met, and carrying out audible and visual alarm.
2. The method for producing random metallic textures of free-form surfaces according to claim 1, wherein the preset threshold is 30±2 ℃.
3. The method according to claim 1, wherein in step S14, the laser system and the second motion system are used to fill the surface of the free-form surface substrate with the texture pattern corresponding to the pre-texture pattern information, so as to complete the exposure operation; and the laser system determines a prefabricated texture micro unit through the dmd spatial light modulator and the beam shaping lens group, and projects a small light curtain to the water-drop-shaped free-form surface substrate through the prefabricated texture micro unit.
4. A method of producing a random metal texture for a free-form surface according to claim 3, wherein the wavelength of the laser light source in the laser system is 375±10nm.
5. The method of claim 1, wherein in step S15, a solution of the de-glue is sprayed to the surface of the water-drop-shaped free-form surface substrate for development, wherein the thickness of the micrometer thin film coating formed after the solvent in the photoresist is evaporated is also different in different time periods of the development process, and the development operation time is defined by determining different photoresist materials and the thickness difference of the micrometer thin film coating; In step 17, the photoresist is sprayed to the surface of the water-drop free-form surface substrate to remove the photoresist, wherein the thickness of the micron film coating formed after the solvent in the photoresist is evaporated is also different in different time periods in the photoresist removing process, and the photoresist removing operation time is defined by determining different photoresist materials and the thickness difference of the micron film coating.
6. The method for producing random metallic textures of free-form surfaces according to claim 1, wherein in step S16, the method comprises the steps of: clamping the developed water-drop-shaped free-form surface substrate in an autorotation fixture; Adopting an RF ion source to perform surface bombardment cleaning on a water drop-shaped free-form surface substrate clamped in the self-rotation tool clamp according to preset operation time; sequentially evaporating a chromium film, a copper film, another chromium film, another copper film and a last chromium film on the surface of the water-drop-shaped free-form surface substrate.

Description

Random metal texture manufacturing method for free curved surface Technical Field The invention relates to the technical field of free-form surface random metal texture manufacturing, in particular to a free-form surface random metal texture manufacturing method. Background At present, in the fields of micro-nano manufacturing and precision engineering, the laser direct writing technology is widely applied to manufacturing complex micro-scale or nano-scale structures due to high resolution and flexibility. However, for the processing of curved substrates, especially in applications requiring multiple scan etching, the technique faces a serious challenge for repeated accuracy. In particular, curved surface at least two scan etches impose particularly stringent requirements on the accuracy and stability of laser direct writing devices. In the process of multiple scanning, even tiny mechanical deviation or alignment error can cause obvious deviation, and the deviation can be accumulated and amplified to finally influence the geometric precision and the functional performance of a product, so that the application range of the laser direct writing technology in high-precision curved surface processing is limited. Disclosure of Invention The application provides a free-form surface random metal texture manufacturing method, which aims to solve the problem that the laser direct writing equipment can have high probability deviation in multiple scanning and etching in the traditional manufacturing method. The free-form surface random metal texture manufacturing method comprises the following steps of: s11, cleaning the water drop-shaped free-form surface substrate by ultrasonic waves, S12, forming a film on the water-drop-shaped free-form surface substrate cleaned by ultrasonic waves to coat photoresist; s13, baking the film-forming water-drop-shaped free-form surface substrate coated with the photoresist for fixing the photoresist; S14, determining pre-texture pattern information, acquiring visual image information of a water-drop-shaped free-form surface substrate after baking and curing according to the pre-texture pattern information, analyzing the visual image information and the pre-texture pattern information, and determining a laser motion track, wherein the laser motion track is used for controlling laser to perform exposure operation on the water-drop-shaped free-form surface substrate after baking and curing according to the pre-texture pattern information; s15, developing the exposed water-drop-shaped free-form surface substrate; S16, carrying out vacuum evaporation coating on the developed water-drop-shaped free-form surface substrate; s17, de-gluing the water-drop-shaped free-form surface substrate after coating; s18, cleaning the de-glued water-drop-shaped free-form surface substrate by ultrasonic waves; And S19, transferring the cleaned and de-glued water-drop-shaped free-form surface substrate to a projection optical imager for texture measurement. By adopting the technical scheme, the movement track of the laser is determined by determining the prefabricated texture pattern information and analyzing the prefabricated texture pattern information and the visual image information of the water drop-shaped free-form surface substrate after baking the solid glue. The step utilizes a high-precision vision system and a preprogrammed space expansion curved surface track to ensure that laser is precisely exposed according to the information of the prefabricated texture pattern, thereby reducing the deviation problem caused by insufficient repetition precision. The method realizes the accurate exposure of the free-form surface substrate by accurately controlling the movement track of the laser, avoids the deviation in the process of repeated scanning and etching, and improves the manufacturing precision and repeatability. In addition, through the subsequent steps of development, vacuum evaporation coating and de-gumming, the method can form uniform and accurate metal textures on the free-form surface substrate, and finally ensures the texture quality through ultrasonic cleaning and optical imaging instrument measurement, thereby realizing high-quality random metal texture manufacturing of the free-form surface, improving the performance and reliability of the product and enhancing the stability and efficiency of the manufacturing process. Preferably, in step S12, the ultrasonic coating mechanism is used to perform film forming coating on the water-drop-shaped freeform surface substrate after ultrasonic cleaning, where the ultrasonic coating mechanism includes a control box, a first motion system, a profiling heating base and a support frame, which are located on the control box, an ultrasonic nozzle is arranged on the first motion system, and a vision system is arranged on the support frame; Step 12 further comprises the steps of: acquiring a motion coordinate system of the water-drop-shaped free-form surface