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CN-122013263-A - Electronic foil preparation device and electronic foil

CN122013263ACN 122013263 ACN122013263 ACN 122013263ACN-122013263-A

Abstract

The disclosure provides an electronic foil preparation device and an electronic foil, relates to the technical field of electronic foil preparation, and aims to solve the technical problems that in the existing electronic foil online preparation, the oxidation and denaturation of a material foil and the surface of a product are difficult to reach nanoscale granularity. The device comprises a foil producing machine, a conveying roller set and post-treatment equipment, wherein the foil producing machine and the post-treatment equipment are arranged on line, the conveying roller set comprises a plurality of conveying rollers, one or more conveying rollers are high-current conductive rollers, the conveying rollers are positioned close to a foil producing machine section of a surface treatment tank, the total current is 200-2000A, the voltage is 2-20V, material foil in the surface treatment tank bypasses the conveying rollers to form a subsurface arc-shaped path, and inclined anodes are arranged on two sides of the conveying rollers. The method shortens the exposure time of the foil through the online connection of the foil producing machine and the post-processing equipment, reduces the oxidation and denaturation of the foil, avoids the mutual interference of the current of the foil producing machine and the post-processing equipment by utilizing the high-current conductive roller, ensures the preparation effect of the two ends, and finally prepares the electronic foil with uniform and compact surface and meeting the requirement of nano-scale granularity.

Inventors

  • CHEN SHAOMING

Assignees

  • 安徽华威铜箔科技有限公司

Dates

Publication Date
20260512
Application Date
20251231

Claims (10)

  1. 1. An electronic foil preparation device is characterized by comprising a foil producing machine and post-processing equipment; The foil producing machine and the post-processing equipment are in online configuration, and the post-processing equipment comprises the conveying roller set and a plurality of processing tanks; The tail end of the foil producing machine is connected with the conveying roller set, and the conveying roller set is used for conveying the foil produced by the foil producing machine to the tail end of the post-treatment equipment through each treatment groove in sequence; The conveying roller set comprises a plurality of conveying rollers, one or more conveying rollers are conductive rollers, at least one conductive roller is located at one side, close to the foil forming machine, of any one surface treatment groove of the treatment grooves, the conductive rollers are located outside the surface treatment grooves, and the conductive rollers are high-current conductive rollers.
  2. 2. The electronic foil manufacturing apparatus of claim 1, wherein the total current of the conductive roller is between 200 and 2000 amps.
  3. 3. The electronic foil manufacturing apparatus according to claim 1, wherein the voltage of the conductive roller is higher than the cathode voltage of the foil producing machine, and the voltage of the conductive roller is between 2-20 volts.
  4. 4. The electronic foil preparing apparatus according to claim 1, wherein an anode and one of said conveying rollers are provided in said surface treatment tank, a part of the roller surface of said conveying roller is immersed under the solution level of said surface treatment tank, and the foil to be treated is conveyed backward by bypassing the roller surface of said conveying roller under the solution level; the foil is in an arc shape attached to the roller surface below the liquid surface of the surface treatment tank, and the anode is immersed below the liquid surface of the solution in the surface treatment tank.
  5. 5. The electronic foil preparing apparatus of claim 4, wherein said anode comprises two anodes symmetrically disposed about a plane passing through said transport roller axis and perpendicular to the solution level and located on either side of said plane.
  6. 6. The electronic foil manufacturing apparatus according to claim 5, wherein two of the anodes are arranged obliquely with respect to the solution surface, and lower ends of the two anodes are offset toward the plane by a predetermined distance from an upper end, the predetermined distance being 1-10 cm.
  7. 7. The electronic foil manufacturing apparatus according to claim 1, wherein the conductive roller is made of metal, and a hollow passage penetrating axially is provided inside the conductive roller; the hollow channel is used for circulating a cooling medium so as to cool the conductive roller, and the working temperature of the conductive roller is maintained at 20-35 ℃.
  8. 8. The electronic foil manufacturing apparatus according to claim 1, wherein the total current of the conductive roller is between 1000 and 1250 a and the voltage of the anode nearest to the conductive roller is between 7-8 v.
  9. 9. The electronic foil manufacturing apparatus according to claim 1, wherein the plurality of treatment tanks includes at least 1 of the surface treatment tanks, at least 1 acid washing treatment tank, at least 1 water washing treatment tank, and at least 1 passivation treatment tank; The pickling treatment tank, the water washing treatment tank and the passivation treatment tank are sequentially arranged on one side, far away from the foil producing machine, of the surface treatment tank along the conveying direction of the foil.
  10. 10. An electronic foil prepared by the electronic foil preparing apparatus according to any one of claims 1 to 9.

Description

Electronic foil preparation device and electronic foil Technical Field The disclosure relates to the technical field of electronic copper foil preparation, in particular to an electronic foil preparation device and an electronic foil. Background The electronic copper foil is used as a core base material in the electronic information industry, and the surface quality (such as granularity, profile and roughness) directly determines the performance of downstream products, for example, the low profile of the copper foil for high-frequency high-speed PCB can reduce signal transmission loss. The existing electronic copper foil production generally adopts a sectional process that a foil producing machine is used for preparing the material foil through electrolytic deposition, and then the material foil is firstly rolled into a material roll and then transferred to independent post-treatment equipment for unreeling treatment. The process has two major core defects: The problems of oxidation and crystalline state denaturation are that after the material foil is stripped from a foil producing machine, the time for winding, transferring and waiting for unreeling is longer than 24 hours, the surface of active copper is in contact with air to generate deep oxidation, and the surface crystalline state structure is irreversibly denatured (such as abnormal growth of crystal grains and crystal boundary oxidation). Even if the subsequent acid washing treatment is carried out, the original crystalline state cannot be completely recovered, so that the surface profile of the finished copper foil is higher (usually more than or equal to 1.5 microns), the particle diameter and the particle height are in micron order (more than or equal to 1 micron) and are unevenly distributed, and the high-end application requirement cannot be met. In order to overcome the problems, the existing electronic copper foil preparation technology also comprises the step of online production of a foil producing machine and post-processing equipment so as to solve the problems of oxidation and crystalline state denaturation of the material foil in production. Since the conventional post-treatment apparatus has a plurality of electrical treatment tanks for performing the step-wise electrical treatment, the electrode arrangement scheme is generally that the cathode and the anode are respectively located outside the two surfaces of the foil in the electrical treatment tanks, which corresponds to the distributed electrode arrangement scheme only. However, the post-treatment equipment still uses the traditional multi-groove step-by-step process, such as a roughening groove combined with a curing groove for multiple cycles, and is not optimized for on-line continuous production characteristics, wherein the traditional process relies on the multi-groove to respectively realize the generation of crystal nuclei and the inhibition of the growth of the crystal nuclei, but the movement speed of a material foil in on-line production is slower, the fluctuation of an electrolytic field is easily caused by multi-groove switching, and the nano-level uniform crystal grains are difficult to prepare. Disclosure of Invention An object of embodiments of the present disclosure is to solve the problem of unstable post-treatment electrolyte fields in existing in-line electronic foil manufacturing devices. According to the first aspect of the disclosure, an electronic foil preparation device is provided, the electronic foil preparation device comprises a foil producing machine and post-processing equipment, the foil producing machine and the post-processing equipment are in online configuration, the post-processing equipment comprises a conveying roller set and a plurality of processing tanks, the tail end of the foil producing machine is connected with the conveying roller set, the conveying roller set is used for conveying a foil prepared by the foil producing machine to the tail end of the post-processing equipment through each processing tank in sequence, the conveying roller set comprises a plurality of conveying rollers, one or more conveying rollers are conductive rollers, at least one conductive roller is located on one side, adjacent to the foil producing machine, of any one of the processing tanks, the conductive rollers are located outside the surface processing tanks, and the conductive rollers are high-current conductive rollers. In an exemplary embodiment of the present disclosure, the total current of the conductive roller is between 200 and 2000 amps based on the foregoing scheme. In an exemplary embodiment of the present disclosure, based on the foregoing solution, the voltage of the conductive roller is higher than the cathode voltage of the foil producing machine, and the voltage of the conductive roller is between 2-20 volts. In an exemplary embodiment of the disclosure, based on the foregoing solution, an anode and one of the conveying rollers are disposed i