37results about "Resist details" patented technology

The invention relates to a novel de-cap method of a rigid-flex board. The method includes the following steps that: (1) after the inner layer covering film of the rigid-flex board is bonded, and the inner layer covering film is covered with a layer of PP prepregs, a layer of cleanable printing ink is printed through screen printing at interdigital windows or grounding points , and a cleanable printing ink protection film is formed; (2) a copper-clad film is laminated and pressed, the copper-clad film is pressed for 3 hours under 180 DEC C; (3) drilling, electroplating, dry film attachment, exposure and development are carried out after pressing and molding; (4) etching processing is carried out by means of an acid etching solution after the development; and (5) an alkaline solution is adopted to carry out film removal after etching is completed, and the cleanable printing ink protection film is dissolved. The novel de-cap method of the invention has the advantages of simple process, convenient operation and cost-saving performance.

The invention provides a method for metallizing and electroplating only a hole wall. The method comprises the following steps of coating a material of a sparse-hole metallization active substance on a copper-clad plate to mask the plate surface, drilling a hole, only activating the hole wall, and only directly electroplating or firstly carrying out chemical plating and then electroplating the hole wall to the required thickness. The material adopted by the invention has the performance of the sparse-hole metallization active substance, the plate surface is masked, metal is only deposited on the hole wall, the thickness of a plating layer is easy to control, the quality of the metallization hole is better, the circuit board can better meet the electrical requirements, finer conductive patterns can be manufactured, the cost is reduced, and the method is environment-friendly. The method is suitable for mass production of various circuit boards, and is further suitable for small-batch and multi-variety production of circuit board samples.

A circuit board including a substrate, a photo imageable dielectric layer and a plurality of conductive bumps is provided. The substrate has a first surface and a first circuit layer, wherein the first surface has a chip disposing area and an electrical connection area, and the first circuit layer is embedded in the first surface. The photo imageable dielectric layer is disposed on the electrical connection area and has a plurality of openings, wherein parts of the first circuit layer is exposed by the openings. The conductive bumps are disposed at the openings respectively and connected to the first circuit layer, wherein a side surface of each of the conductive bumps is at least partially covered by the photo imageable dielectric layer. In addition, a manufacturing method of the circuit board is also provided.

A liquid solder resist composition contains a carboxyl group-containing resin, a photopolymerizable compound containing at least one compound selected from a group consisting of a photopolymerizable monomer and a photopolymerizable prepolymer, a photopolymerization initiator, a titanium dioxide, and a compound having a cyclic ether skeleton. The titanium dioxide contains both of a rutile titanium dioxide manufactured by a sulfuric acid method and a rutile titanium dioxide manufactured by a chlorine method.

The invention discloses a time control method and system for organic solderability preservatives (OSP) surface processing on a printed circuit board (PCB). The method comprises the steps of performing identification on each PCB, and marking each PCB; recording time of each PCB entering each processing station; and comparing recorded time with preset time, and taking corresponding measure according to a comparison result. The system comprises a scanning module, a control module, a warning module and a display module, wherein an output end of the scanning module is connected with an input end of the control module, and an output end of the control module is connected with the warning module and the display module. Compared with the prior art, the processing time of the PCB is strictly controlled, the quality of the PCB leaving from a factory is ensured, the return rate is greatly reduced, manual control is omitted, and the production cost is reduced.

In this etching method, the surface (11a) of a target object (11) is processed by using a corrosive agent to corrode said surface (11a) as a means of solving the problem addressed by the present invention. The etching method comprises: a resist formation step in which resist liquid is inkjet-printed on the surface (11a) so that the resist liquid forms a resist (12); a surface corrosion step in which the side (11a) of the target object (11) on which the resist (12) was formed by the resist formation step is brought into contact with a corrosive agent so that the part of the surface (11a) not having the resist (12) formed thereon is corroded; and a resist peeling step in which the resist (12) is peeled from the surface (11a) after the surface corrosion step. The etching method is characterized by the resist formation step being a step in which the resist (12) is formed using a resist liquid containing a monofunctional monomer or a monofunctional oligomer and a polyfunctional monomer or a polyfunctional oligomer.

The present invention provides a process and a structure of forming conductive vias using a light guide. In an exemplary embodiment, the process includes providing a via in a base material in a direction perpendicular to a plane of the base material, applying a photoresist layer to an interior surface of the via, inserting a light guide into the via, exposing, by the light guide, a portion of thephotoresist layer to light, thereby resulting in an exposed portion of the photoresist layer and an unexposed portion of the photoresist layer, removing a portion of the photoresist layer, and platingan area of the via, where the photoresist has been removed, with a metal, thereby resulting in a portion of the via plated with metal and a portion of the via not plated with metal.

Disclosed is a production method of a multi-layered printed wiring board, including the following steps 1 to 3:

• • Step 1: a step of laminating, on a substrate with inner layer circuit, a metal foil with adhesive layer including a support, a metal foil having a thickness of 3 μm or less and ⅙ or less relative to the thickness of the inner layer circuit, and an organic adhesive layer having a thickness of 10 μm or less in this order, via an organic insulating resin layer such that the organic insulating resin layer and the organic adhesive layer are opposed to each other, and then releasing the support to form a laminated sheet (a) having the metal foil as an outer layer metal foil layer;
  • Step 2: a step of irradiating the laminated sheet (a) with a laser to bore the outer layer metal foil layer, the organic adhesive layer, and the organic insulating resin layer to form a bored laminated sheet (b) having a blind via hole; and
  • Step 3: a step of forming an outer layer circuit connected with the inner layer circuit through the following steps 3-1 to 3-4:
  • Step 3-1: a step of etching removing the outer layer metal foil layer of the bored laminated sheet (b) formed in the step 2 and then forming an outer layer copper layer having a thickness of 2 μm or less on the bored laminated sheet (b);
  • Step 3-2: a step of forming a resist pattern by a resist applied on the outer layer copper layer;
  • Step 3-3: a step of forming a circuit layer on the surface of the outer layer copper layer on which the resist pattern is not formed, by electrolytic copper plating; and
  • Step 3-4: a step of removing the resist pattern and then removing the exposed outer layer copper layer by etching, thereby forming an outer layer circuit connected with the inner layer circuit.

The invention provides a first liquid and a second liquid of a two-liquid mixing type, wherein the first liquid and the second liquid have excellent storage stability and can prevent deviation of the reflectivity of an anti-corrosion film. The first liquid and the second liquid are used for obtaining a mixture, that is, a first liquid and a second liquid of a two-liquid mixing type of a photo-sensitive composition. The first liquid contains a carboxyl-containing polymerizable polymer, a polymerization initiator, titanium oxide, inorganic filler and an organic solvent. The second liquid contains a cyclic-ether-containing compound, titanium oxide and inorganic filler, and is free of an organic solvent. No more than 10% by weight of the photo-sensitive composition contains the organic solvent based on that the photo-sensitive composition contains 100% by weight of the whole organic solvent.

The invention discloses a micro-strip circuit board etching method and an improved device. The device comprises a shell, a cover plate, a connecting pipe, a through hole and a screw hole. The shell is internally provided with a water storage bin, a vibration motor is installed on one side of the outer wall of the lower end of the water storage bin, and a first rubber hose and a second rubber hose are inserted into the lower end of the inner wall of the water storage bin. The cover plate is arranged on one side of the outer wall of the upper end of the shell; the vibration motor is installed on one side of the outer wall of the lower end of the water storage bin; the connecting pipe is inserted into one side of the outer wall of the lower end of the shell; and the outer walls of the two ends of the connecting pipe penetrate through the shell to be connected with the first rubber hose and the second rubber hose correspondingly. By arranging the vibration motor, a spring and the water storage bin, the effect of removing bubbles on the surface of a circuit board is achieved, it is guaranteed that etching liquid can make full contact with the circuit board, the etching effect of the etching liquid on the circuit board is guaranteed, and the etching quality of the circuit board is guaranteed.

A manufacturing method of a circuit board and a stamp are provided. The method includes the following steps. A circuit pattern and a dielectric layer covering the circuit pattern are formed on a dielectric substrate. A conductive via connected to the circuit pattern is formed in the dielectric layer. A photoresist material layer is formed on the dielectric layer. An imprinting process is performed on the photoresist material layer using a stamp to form a patterned photoresist layer, wherein the pressing side of the stamp facing the circuit pattern becomes sticky when subjected to pressure so as to catch photoresist residue from the photoresist material layer in the imprinting process. A patterned metal layer is formed on a region exposed by the patterned photoresist layer. The patterned photoresist layer is removed.

A manufacturing method of a circuit board including the following steps is provided. A carrier substrate is provided. A patterned photoresist layer is formed on the carrier substrate. An adhesive layer is formed on the top surface of the patterned photoresist layer. A dielectric substrate is provided. A circuit pattern and a dielectric layer covering the circuit pattern are formed on the dielectric substrate, wherein the dielectric layer has an opening exposing a portion of the circuit pattern. The adhesive layer is adhered to the dielectric layer in a direction that the adhesive layer faces of the dielectric layer. The carrier substrate is removed. A patterned metal layer is formed on a region exposed by the patterned photoresist layer. The patterned photoresist layer is removed. The adhesive layer is removed.

A manufacturing method of a circuit board and a piezochromic stamp are provided. A circuit pattern is formed on a dielectric substrate. A dielectric layer having a hole or a conductive via and covering the circuit pattern is formed on the dielectric substrate. A conductive seed layer is formed on the dielectric layer. A photoresist layer is formed on the conductive seed layer. A piezochromic stamp is imprinted on the photoresist layer, wherein when the pressing side of the piezochromic stamp is in contact with the conductive seed layer, the light transmittance effect thereof is changed to blocking or allowing light having a specific wavelength to pass through. A patterned photoresist layer is formed by using the piezochromic stamp as a mask. A patterned metal layer is formed on the exposed conductive seed layer. The patterned photoresist layer and the conductive seed layer are removed.

The invention discloses a method for removing a dry film on a copper layer of a circuit board, and relates to the field of circuit board manufacturing. The method comprises the following steps: providing a circuit board substrate, wherein a copper layer is arranged on the surface of the circuit board substrate; forming a dry film with a plurality of openings on the copper layer, wherein the copper layer area exposed in each opening is a gold plating area; forming a metal layer in each gold plating area; making the circuit board soaked and defilmed in an organic defilming solution at the temperature of 50-60 DEG C, wherein the organic defilming solution comprises sodium hydroxide, an interfacial agent, a copper protection agent and a regenerant; and after soaking is completed, the oxidation rate of the copper surface of the copper layer being 0.13%-1.25%.

The present invention relates to a resin composition having excellent dispersity, settling stability, and agglomeration stability. In addition, the present invention relates to a solder resist structure, a dry film, and a printed wiring board, which are formed from the resin composition and exhibit high average reflectance and reflectance at a wavelength of 450 nm before and after a reflow process without requiring a reflective plate. The resin composition is characterized in that a photosensitive resin composition and a thermosetting resin composition contain (B) rutile titanium oxide, (C) a phosphor and (D) a colorant, and the (C) phosphor is coated with the (D) colorant.