15 results about "Screen printing" patented technology

A paste supply apparatus includes a plurality of paste pots each including a bottomed tubular container storing paste and a movable inner lid provided in the tubular container and having a through hole formed in a center portion thereof, and a pot holder which holds the paste pots so as to be horizontally arranged along an arrangement direction such that the through hole of each of the paste pots is directed downward and downward movement of the inner lid thereof is regulated. The paste supply apparatus further includes a pot holder moving device which moves the pot holder along the arrangement direction and selectively positions one of the plurality of paste pots at an ejection position, and a paste ejecting device which presses the tubular container of the paste pot positioned at the ejection position and which ejects the paste in the tubular container from the through hole.

The invention discloses a manufacturing process of an interlayer copper connector of a printed circuit board. The manufacturing process comprises the following steps: coating a glue resin layer and sticking and pressing release paper on two sides of the outer surface of an insulation layer; forming pores and machining; removing the release paper on one side and coating a copper layer; filling holes with electric conductive colloid; removing the release paper on the other side and coating a copper layer; and pressing, fitting and curing. According to the invention, by adopting a simply and easily operated silk screen printing technology and by combining the electric conductive colloid with low liquidity, the chemical copper depositing and plating technology in the production technology of the traditional printed circuit board is replaced successfully, the conduction performance of the copper layer on performance can be achieved, zero emission and zero pollution in the environment protection aspect are achieved, the investment total amount in device input and plant input aspects is reduced, the investment hazard is reduced, and the conditions for rapid production and manufacturing cycle shortening are provided for the market demand of the printed circuit boards on the aspect of production efficiency.

The invention discloses a printing screen having anisotropic tensile force and a manufacturing method of the printing screen having the anisotropic tensile force. Net yarn is stretched around and fixed on a screen frame of a screen, four directions exert different tensile force on different sections to stretch outwards the net yarn on the screen, different tensile force is presented on different sections through the surface of the net yarn, and a set section is enabled to reach needed specific tensile force. Through different tensile force presented on different sections of the screen, local printing pressure release is formed, over printing pressure in a specific section is avoided, deformation and abrasion of the net yarn or a printing film layer are reduced, service life of the screen is prolonged, excessive deformation or excessive displacement of the printing film layer due to uneven scraping and uneven printing is also avoided, and therefore a goal of accurate printing is achieved.

The invention discloses a production method of a glue attached G/G capacitive screen. The method includes the following steps that a silk-screen printing screen is installed on a silk screen support; an attaching jig is inlaid in a mounting groove in a platform; a glass assembly is fixed on the platform located below the attaching jig; a release film on the glass assembly is torn off, glue is injected into a silk screen and scraped to be flat with a scraper, and the glue is made to permeate mesh holes in the silk-screen printing screen and be evenly distributed on the glass assembly; a cover plate is placed in a clamping groove of the attaching jig to make the glass assembly naturally attached to the cover plate; the capacitive screen after the attaching is placed in a UV light environment to be irradiated by ultraviolet light. The method has the advantages of combining concrete technological requirements of a screening printing laminator with relative mature technologies and glue attaching of the G/G capacitive screen, reducing various kinds of large equipment, shrinking space occupied by production equipment, lowering production cost, shortening the production period and improving production efficiency and yield.

The invention discloses an analog printing preprocessing process. The screen deformation quantity during actual printing is reduced, and the service life of a screen printing plate is prolonged in an analog printing mode. The preprocessing process comprises the following steps: fixing a screen printing plate which is qualified through detection, positioning a roller on a central part of the screen printing plate and lifting a screen of the screen printing plate up to a certain height; moving the roller from the central part of the screen to an edge, turning the screen printing plate for 90 degrees and repeating the reciprocating motion of the roller to obtain the tension-released screen printing plate. By such a mode, the analog printing preprocessing process has the advantages that the tension release before printing is realized in the analog printing mode, the screen deformation quantity during actual printing is reduced, the sizes of patterns on the screen are prevented from being damaged by squeegee of a scraper to the screen in the printing process, the stability of the printing accuracy is improved, meanwhile the durability of the screen printing plate is guaranteed, wastes during the printing are effectively reduced, the production cost is reduced, and the added value of the product is increased.

The invention discloses a telephone screen printing quality detection method and a system. The method comprises the following steps: obtaining a to-be-detected telephone picture and a screen printingtemplate set corresponding to a to-be-detected telephone model; wherein the screen printing template set comprises a plurality of screen printing templates, and the screen printing templates comprisetemplate original image information; carrying out contour matching on a silk-screen template in the silk-screen template set and a telephone picture, and positioning a matching image matched with silk-screen in the template original picture in the telephone picture; and carrying out image processing on the matching image and the template original image, comparing, and outputting whether the silk screen in the matching image is qualified or not. Automatic detection of the telephone screen printing quality is realized based on the machine vision and the image algorithm so that the detection quality can be enhanced, the product quality can be guaranteed, the production efficiency can be enhanced and the labor cost can be reduced.

A screen printing method of LED module with phosphor includes: board preparation providing an LED module board with a substrate and a plurality of LED sources fixed on the substrate. The LED sources are flip chip structural and the metal electrodes thereof are fixed to the bonding pads of the substrate. A screen board is provided with meshes corresponding to the shiny sides of the LED sources of the substrate one by one. A projection of each mesh to the shiny side of the corresponding LED source has similar shape with the shiny side of the LED source. The top of the screen board is printed with allocated colloidal phosphor until each mesh is coated fully. The printed substrates are baked to solidify the phosphor. The periphery of the shiny side is fully coated.

The invention provides a screen printing ink automatic feeding device which comprises a box body (1), a magnetic stirrer (2) is arranged in the box body (1), an ink supply barrel (3) is arranged on the magnetic stirrer (2), an ink supply peristaltic pump (4) is arranged on the box body, and an ink inlet tube (5) is arranged between the ink supply tank (3) and the ink peristaltic pump (4). One sideof the ink supply peristaltic pump (4) is provided with an ink outlet pipe (6) which is provided with a first electromagnetic valve (7), a group of ink dividing tubes (8) are connected in parallel atan end of the ink outlet pipe (6), and each of the ink dividing tubes (8) is provided with a valve (8a) corresponding to an ink supply head (9). The device has the advantages of simple structure, convenience in use, uniform ink ejection, low cost and the easy adjustment of ink supply.

The invention discloses an N-type single-sided cell preparation method. The N-type single-sided cell preparation method comprises steps that 1) texturing of an N-type silicon wafer is carried out; 2) HCI solution, HF solution, and HPO3 solution are sequentially used for cleaning; 3) POCl 3 mixed liquor is prepared; 4) the back surface of the cleaned silicon wafer is provided with a silicon nitride mask in an adhesive manner, and then is disposed in the POCI 3 mixed liquor, and then is disposed in a diffusion furnace for heating; 5) cooling is carried out, the silicon wafer after phosphorus diffusion is taken out, and the mask is torn off; 6) by adopting wet etching technology, the front surface is provided with a silicon nitride anti-reflection film in a plated way; 7) silk-screen printing is carried out, and sintering of front surface grid lines and back surface aluminum back surface field. A P type technology is used for the preparation of the N type single-sided cell, and therefore costs are low, the technology is simple, production efficiency is low, and large-scale production is realized; and by adopting the solution method having a new formula for the phosphorus diffusion, the diffusion is uniform, the costs are low, the efficiency is high, energy saving and environment protection are realized, and photoelectric conversion efficiency is high.

The invention discloses an electrochemical sensor electrode for rapidly and simultaneously detecting lead ions and cadmium ions as well as a preparation method and application of the electrochemical sensor electrode, and belongs to the technical field of electrochemical sensors. According to the invention, a bovine serum albumin-aminated graphene oxide-glutaraldehyde cross-linking material is synthesized in situ on the surface of a screen-printed carbon electrode, and a flower-like bismuth tungstate material is loaded on the surface of the electrode by a dispensing method, so that an electrode sensitive interface of the sensor is constructed; and simultaneous square wave anodic stripping voltammetry detection of trace lead and cadmium ions is realized. Compared with the prior art, the method has the advantages of high sensitivity, accurate result, simplicity in operation, easiness in carrying, recyclability and the like, and the heavy metals lead and cadmium in the water body can be rapidly and quantitatively analyzed and detected at the same time without pretreatment.