Film coating method for improving interference color of 3D surface

Abstract

The invention discloses a coating method for improving interference color of a 3D (three-dimensional) surface, and belongs to the field of PVD (physical vapor deposition) coating. The method comprises the steps that S1, a sample is installed on a three-dimensional material frame, and a shielding piece is installed on the three-dimensional material frame; s2, the three-dimensional material frame is fed into a Ti target cavity; s3, argon is introduced, and a medium-frequency coating power supply is started to deposit a pure Ti layer; s4, after film coating is completed, the thickness of the film layers on the front face and the side face of the film coating 3D sample is measured; s5, adjusting the size and the position of the shielding sheet according to a measurement result, and repeating the steps S1 to S4 until the thicknesses of the film layers on the front surface and the side surfaces of all direction points are consistent; and S6, according to a result of the step S5, calling an interference process, adjusting the shape of the shielding sheet, and debugging an optimal coating method for the interference color of the 3D surface. Compared with the prior art, the shielding sheet is arranged on the common three-dimensional material rack, so that the film layer thickness of the front surface and the side surfaces in the three-o'clock and nine-o'clock directions of the sample is reduced and is consistent with the film layer thickness of the side surfaces in the six-o'clock and twelve-o'clock directions, and the uniformity of interference colors on the five surfaces is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of PVD coating, and in particular relates to a coating method for improving 3D surface interference color. Background Art

[0002] PVD coating for 3D samples is now quite common. In ordinary coating processes, due to the different positions of the various surfaces of the 3D sample in the coating chamber, the coated film has the problem of different colors on the front and side. The main reason for this problem is that the sputtering time of the front target is longer than that of the side, making the thickness of the front film much greater than that of the side film. The usual improvement measures are to use a three-dimensional rotating frame or increase the rotating frame speed. However, whether it is a three-dimensional rotating frame or increasing the speed, it can only reduce the color difference between the front and the sides at 3 o'clock and 9 o'clock within a certain range. The improvement of the front and side colors at the 12 o'clock and 6 o'clock directions is very small, so it is impossible to completely overcome the problem of front and side colors. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a coating method for improving 3D surface interference colors. By installing a shielding sheet on an ordinary three-dimensional material rack and continuously adjusting the process, the film thickness on the front side of the sample and the sides at 3 o'clock and 9 o'clock directions can be reduced to be consistent with the film thickness on the sides at 6 o'clock and 12 o'clock directions, thereby achieving the uniformity of five-sided interference colors.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] The present invention provides a coating method for improving 3D surface interference color, comprising the steps of:

[0006] S1: Install the 3D sample to be coated on the 3D material rack of the coating machine, and install a shielding sheet on the 3D material rack;

[0007] S2: Send the three-dimensional material rack into the Ti target chamber of the continuous coating production line;

[0008] S3: introduce argon gas to make the gas pressure reach a predetermined value, set the bias voltage, and turn on the medium frequency coating power supply to deposit a pure Ti layer;

[0009] S4: After the coating is completed, the 3D material rack is controlled to be taken out of the oven, and the film thickness of the front and side surfaces at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock directions of the coated 3D sample is measured;

[0010] S5: adjusting the size and position of the shielding sheet according to the measurement result in step S4, and repeating steps S1-S4 until the thickness of the film layer on the front side and the side surfaces at points in all directions is consistent;

[0011] S6: According to the result of step S5, the interference process is called, and according to the interference color results of the front and side surfaces of the 3D sample, the shape of the shielding sheet is adjusted to debug the best coating method for the 3D surface interference color.

[0012] In step s6, an interference color process is performed using a silicon target and a chromium target.

[0013] Furthermore, in step S1, after the shielding sheet is installed, the difference in thickness of the front and side film layers can be adjusted by the shielding sheet during the coating process.

[0014] Furthermore, in step S3, the predetermined value of the gas pressure is 0.4 Pa, the bias voltage is -100 V, and the coating time is 40 minutes.

[0015] Furthermore, in step S4, 9 positions are selected in a matrix manner on the front side for measurement, and 3 positions are evenly selected on each side for measurement.

[0016] Compared with the prior art, the beneficial effect of the present invention is: by installing a baffle on an ordinary three-dimensional material rack and constantly adjusting the size and position of the baffle, the film thickness on the front side of the sample and the sides at 3 o'clock and 9 o'clock directions can be reduced to be consistent with the film thickness on the sides at 6 o'clock and 12 o'clock directions, thereby achieving the uniformity of the five-sided interference colors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flowchart of the preparation method of this embodiment. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] To achieve the above object, the technical solution of the present invention is as follows:

[0020] See also Figure 1 As shown, this embodiment provides a coating method for improving 3D surface interference color, the equipment configuration is: one continuous coating machine line; the target material configuration includes 5 pairs of Cr targets, 4 pairs of Si targets, and 1 pair of Ti targets; one continuous line modified material rack; one three-dimensional material rack; and several shielding sheets with a size of 159x30 to 165x50. The coating method includes the following steps:

[0021] S1: Install the 3D sample to be coated on the 3D material rack of the coating machine, and install a shielding sheet on the 3D material rack;

[0022] S2: Send the three-dimensional material rack into the Ti target chamber of the continuous coating production line;

[0023] S3: introduce argon gas to make the gas pressure reach a predetermined value, set the bias voltage, and turn on the medium frequency coating power supply to deposit a pure Ti layer;

[0024] S4: After the coating is completed, the 3D material rack is controlled to be taken out of the oven, and the film thickness of the front and side surfaces at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock directions of the coated 3D sample is measured;

[0025] S5: adjusting the size and position of the shielding sheet according to the measurement result in step S4, and repeating steps S1-S4 until the thickness of the film layer on the front side and the side surfaces at points in all directions is consistent;

[0026] S6: According to the result of step S5, the interference process is called, and according to the interference color results of the front and side surfaces of the 3D sample, the shape of the shielding sheet is adjusted to debug the best coating method for the 3D surface interference color.

[0027] In step s6, an interference color process is performed using a silicon target and a chromium target.

[0028] Furthermore, in step S1, after the shielding sheet is installed, the difference in thickness of the front and side film layers can be adjusted by the shielding sheet during the coating process.

[0029] Furthermore, in step S3, the predetermined value of the gas pressure is 0.4 Pa, the bias voltage is -100 V, and the coating time is 40 minutes.

[0030] Furthermore, in step S4, 9 positions are selected in a matrix manner on the front side for measurement, and 3 positions are evenly selected on each side for measurement.

[0031] Compared with the prior art, this embodiment installs a baffle on an ordinary three-dimensional material rack and continuously adjusts the size and position of the baffle to reduce the film thickness on the front side of the sample and on the sides at 3 and 9 o'clock, so as to make it consistent with the film thickness on the sides at 6 and 12 o'clock, thereby achieving uniformity of five-sided interference colors.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coating method for improving 3D surface interference color, characterized in that: Includes steps: S1: Install the 3D sample to be coated on the 3D material rack of the coating machine, and install a shielding sheet on the 3D material rack; S2: Send the three-dimensional material rack into the Ti target chamber of the continuous coating production line; S3: introduce argon gas to make the gas pressure reach a predetermined value, set the bias voltage, and turn on the medium frequency coating power supply to deposit a pure Ti layer; S4: After the coating is completed, the 3D material rack is controlled to be taken out of the oven, and the film thickness of the front and side surfaces at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock directions of the coated 3D sample is measured; S5: adjusting the size and position of the shielding sheet according to the measurement result in step S4, and repeating steps S1-S4 until the thickness of the film layer on the front side and the side surfaces at points in all directions is consistent; S6: According to the result of step S5, the interference process is called, and according to the interference color results of the front and side surfaces of the 3D sample, the shape of the shielding sheet is adjusted to debug the best coating method for the 3D surface interference color.

2. A coating method for improving 3D surface interference color according to claim 1, characterized in that: In step S1, after the shielding sheet is installed, the difference in thickness of the front and side film layers can be adjusted by the shielding sheet during the coating process.

3. A coating method for improving 3D surface interference color according to claim 1, characterized in that: In step S3, the preset value of the gas pressure is 0.4 Pa, the bias voltage is -100 V, and the coating time is 40 minutes.

4. A coating method for improving 3D surface interference color according to claim 1, characterized in that: In step S4, 9 positions are selected in a matrix manner on the front side for measurement, and 3 positions are evenly selected on each side for measurement.

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