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CN-121994642-A - Method for reducing and detecting ink bubbles

CN121994642ACN 121994642 ACN121994642 ACN 121994642ACN-121994642-A

Abstract

The invention discloses a method for reducing and detecting ink bubbles, which relates to the technical field of ink, and comprises the steps of taking ink, designing a dispensing path, optimizing the dispensing quantity and the dispensing speed, calculating through a formula to obtain the dispensing quantity, setting the dispensing speed, and dispensing; placing in a vacuum eutectic furnace, vacuumizing step by step to a limit vacuum degree, degassing, heating, and solidifying to obtain a dispensing product, taking the dispensing product, adding an antioxidant solution, recording the temperature T 1 and the volume V 3 of the dispensing product, incubating, vacuumizing to the limit vacuum degree, and recording the temperature T 2 and the volume V 4 of the dispensing product after vacuumizing. According to an ideal gas formula, the volumes of bubbles in the ink and the dispensing products before and after vacuum pumping are calculated by measuring the volume change of the ink and the dispensing products in the scale bottle and the separated scale cup caused by the expansion of the bubbles under the vacuum condition, and the air discharge is facilitated by adopting a spiral or Z-shaped path dispensing path and a continuous, unidirectional and non-closed dispensing path.

Inventors

  • CAO HAIYANG
  • XU BIN
  • DING QIN
  • ZUO XUAN

Assignees

  • 江苏富乐华半导体科技股份有限公司

Dates

Publication Date
20260508
Application Date
20260303

Claims (10)

  1. 1. A method for reducing and detecting ink bubbles is characterized by comprising the following steps: Firstly, taking ink, pouring the ink into a scale bottle, recording the volume V 1 of the ink, connecting a vacuum pump pipeline, vacuumizing to the limit vacuum degree, and recording the volume V 2 of the vacuumized ink; Step two, taking printing ink, designing a dispensing path, optimizing the dispensing amount and the dispensing speed, calculating through a formula to obtain the dispensing amount, setting the dispensing speed, dispensing, placing in a vacuum eutectic furnace, vacuumizing step by step to a limit vacuum degree, degassing, heating, and solidifying to obtain a dispensing product; And thirdly, taking the dispensing product, adding an antioxidant solution, recording the temperature T 1 and the volume V 3 of the dispensing product, incubating, vacuumizing to the limit vacuum degree, recording the temperature T 2 and the volume V 4 of the dispensing product after vacuumizing, and respectively calculating the air bubble volume of the printing ink before vacuumizing, the air bubble volume of the printing ink after vacuumizing, the air bubble volume of the dispensing product before vacuumizing and the air bubble volume of the dispensing product after vacuumizing through formulas.
  2. 2. A method for reducing and detecting ink bubbles according to claim 1, wherein the ink bubble volume before vacuum pumping = ultimate vacuum x (V 2 -V 1 )/(atmospheric pressure-ultimate vacuum), and the ink bubble volume after vacuum pumping = ink bubble volume before vacuum pumping + V 2 -V 1 .
  3. 3. The method for reducing and detecting ink bubbles according to claim 1, wherein before the vacuum is applied, the volume of the dispensing product is equal to or greater than the critical vacuum level x (V 4 -V 3 ）×T 1 /(atmospheric pressure x T 2 -critical vacuum level x T 1 ), and after the vacuum is applied, the volume of the dispensing product is equal to or greater than the volume of the dispensing product before the vacuum is applied +V 4 -V 3 .
  4. 4. The method for reducing and detecting ink bubbles according to claim 1, wherein in the second step, the dispensing path is any one of a spiral path and a Z-shaped path, the dispensing amount=the volume of a dispensing area×the filling height ratio×the ink density, and the dispensing speed is 20-30mm/s.
  5. 5. The method for reducing and detecting ink bubbles according to claim 1, wherein in the step two, the step-by-step vacuumizing process is that vacuumizing is stopped until the vacuum degree is 4×10 4 -6×10 4 Pa, vacuumizing is stopped for 1-3min, vacuumizing is stopped for 5×10 3 -1.5×10 4 Pa, vacuumizing is stopped for 1-3min, vacuumizing is stopped for a limit vacuum degree, and degassing is performed for 4-6min.
  6. 6. The method for reducing and detecting ink bubbles according to claim 1, wherein the antioxidant solution is prepared by adding pentaerythritol tetrakis (3, 5-di-tert-butyl-4-hydroxyhydrocinnamate) and tris (2, 4-di-tert-butyl) phenyl phosphite into absolute ethyl alcohol, and uniformly mixing to obtain the antioxidant solution, wherein the mass ratio of pentaerythritol tetrakis (3, 5-di-tert-butyl-4-hydroxyhydrocinnamate) to tris (2, 4-di-tert-butyl) phenyl phosphite is (0.8-1.2) to (0.8-1.2).
  7. 7. The method for reducing and detecting ink bubbles according to claim 4, wherein the volume of the dispensing area = surface area of the dispensing area x copper thickness, and the filling height ratio is 1.05-1.1.
  8. 8. The method for reducing and detecting ink bubbles according to claim 1, wherein the ink is prepared by taking an organosilicon modified epoxy graft copolymer, a modified filler, a defoaming agent and a leveling agent, uniformly mixing, adding a curing agent and an accelerator, uniformly mixing, stirring unidirectionally for 5-10min under the condition of 200-400rpm, placing in a vacuum eutectic furnace, vacuumizing step by step to a limit vacuum degree, and degassing.
  9. 9. The method for reducing and detecting ink bubbles according to claim 8, wherein the preparation method of the organosilicon modified epoxy graft copolymer is characterized in that absolute ethyl alcohol is added into deionized water, and is uniformly mixed, tridecylfluorooctyl triethoxysilane, gamma-aminopropyl triethoxysilane, gamma-glycidol ether oxypropyl trimethoxysilane, methyltriethoxysilane, phenyl triethoxysilane and dimethyl diethoxysilane are added, and are uniformly mixed, hydrochloric acid is used for regulating the pH value to 3-4, the reaction is carried out for 2-4 hours under the conditions of the temperature of 65-75 ℃ and the rotating speed of 900-1100rpm, so that an epoxy organosilicon prepolymer is obtained, and epoxy organosilicon prepolymer, epoxy resin and 2-methylimidazole are taken and reacted for 6-8 hours under the conditions of the temperature of 110-130 ℃ so that the organosilicon-epoxy graft copolymer is obtained.
  10. 10. The method for reducing and detecting ink bubbles according to claim 8, wherein the preparation method of the modified filler is characterized by adding absolute ethyl alcohol into deionized water, uniformly mixing, adding gamma-aminopropyl triethoxysilane, adjusting the pH value to 4-5 by using hydrochloric acid, stirring for 40-50min to obtain gamma-aminopropyl triethoxysilane solution, adding nano silicon dioxide into absolute ethyl alcohol, performing ultrasonic treatment for 20-30min, adding gamma-aminopropyl triethoxysilane solution, stirring for 4-6h at the temperature of 60-70 ℃, centrifuging, washing, and drying to obtain the modified filler.

Description

Method for reducing and detecting ink bubbles Technical Field The invention relates to the technical field of ink, in particular to a method for reducing and detecting ink bubbles. Background In the preparation process of the copper-clad ceramic substrate, ink is required to be used in the processes of solder resist and dispensing, but air bubbles are easy to generate in the process of using the ink, and the reason is that firstly, the air bubbles are generated in the process of stirring the ink, the defoaming capability of the ink is poor, the air bubbles cannot be discharged in time, and secondly, in the process of dispensing, the dispensing path, the dispensing amount and the dispensing speed are set improperly, for example, the dispensing amount is too small, the colloid is contracted in the curing process to generate edge air bubbles, and the dispensing speed is too high, and air is doped in the process of dispensing to generate air bubbles. The method has the advantages that bubbles are not discharged in time after being generated and remain in the process, adverse effects are generated on subsequent processes, bubbles are removed through degassing, ink is easy to splash in the degassing process and splashed to other areas to be difficult to remove, and in addition, a bubble content detection means is not available at present, so that the bubble removal condition is difficult to monitor in the production process, and the quality of products is not easy to control. In order to solve the problems, the invention provides a method for reducing and detecting ink bubbles. Disclosure of Invention The invention aims to provide a method for reducing and detecting ink bubbles, which is used for solving the problems in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: Firstly, taking ink, pouring the ink into a scale bottle, recording the volume V 1 of the ink, connecting a vacuum pump pipeline, vacuumizing to the limit vacuum degree, and recording the volume V 2 of the vacuumized ink; Step two, taking printing ink, designing a dispensing path, optimizing the dispensing amount and the dispensing speed, calculating through a formula to obtain the dispensing amount, setting the dispensing speed, dispensing, placing in a vacuum eutectic furnace, vacuumizing step by step to a limit vacuum degree, degassing, heating, and solidifying to obtain a dispensing product; And thirdly, taking the dispensing product, adding an antioxidant solution, recording the temperature T 1 and the volume V 3 of the dispensing product, incubating, vacuumizing to the limit vacuum degree, recording the temperature T 2 and the volume V 4 of the dispensing product after vacuumizing, and respectively calculating the air bubble volume of the printing ink before vacuumizing, the air bubble volume of the printing ink after vacuumizing, the air bubble volume of the dispensing product before vacuumizing and the air bubble volume of the dispensing product after vacuumizing through formulas. Preferably, the volume of the ink bubble before vacuumizing is =the ultimate vacuum degree× (V 2-V1)/(the atmospheric pressure-the ultimate vacuum degree), and the volume of the ink bubble after vacuumizing is =the volume of the ink bubble before vacuumizing+V 2-V1. Preferably, the volume of the dispensing product bubbles before vacuumizing=the ultimate vacuum degree× (V 4-V3）×T1/(atmospheric pressure×T 2 -ultimate vacuum degree×T 1), and the volume of the dispensing product bubbles after vacuumizing=the volume of the dispensing product bubbles before vacuumizing+V 4-V3. Preferably, the ultimate vacuum degree is 1-100Pa. In the optimized step two, the dispensing path is any one of a spiral path and a Z-shaped path, the dispensing quantity=the volume of the dispensing area×the filling height ratio×the ink density, and the dispensing speed is 20-30mm/s. Preferably, in the second step, the step-by-step vacuumizing process comprises vacuumizing to a vacuum degree of 4X 10 4-6×104 Pa, stopping vacuumizing for 1-3min, vacuumizing to a vacuum degree of 5X 10 3-1.5×104 Pa, stopping vacuumizing for 1-3min, vacuumizing to a limit vacuum degree, and degassing for 4-6min. The optimized preparation method of the antioxidant solution comprises the steps of adding pentaerythritol tetra (3, 5-di-tert-butyl-4-hydroxyhydrocinnamate) and tri (2, 4-di-tert-butyl) phenyl phosphite into absolute ethyl alcohol, and uniformly mixing to obtain the antioxidant solution, wherein the mass ratio of the pentaerythritol tetra (3, 5-di-tert-butyl-4-hydroxyhydrocinnamate) to the tri (2, 4-di-tert-butyl) phenyl phosphite is (0.8-1.2). More optimally, the volume of the dispensing area = the surface area of the dispensing area x the copper thickness; the filling height ratio is 1.05-1.1. The optimized preparation method of the printing ink comprises the steps of taking the organosilicon modified epoxy graft copolymer, the modified