Ultra-micro glue dispensing device and method

Abstract

The invention provides an ultra-micro glue dispensing device and a method. The device comprises a glass micro tube, a glue solution and a solution moving needle which is arranged in the glass micro tube and can move to pass through the glue solution, wherein the glass micro tube is internally provided with the glue solution. The method comprises the step of realizing the ultra-micro glue dispensing by the micro liquid drop which is absorbed at the front end of the solution moving needle when the solution moving needle is penetrated through the glass micro tube. The invention is simple and easy to run, and can be used for not only the contact type ultra-micro glue dispensing but also the non-contact type ultra-micro glue dispensing, thereby being wide in an applicable viscosity range; the size of a glue spot can be easily changed by adjusting the diameter size of the front end of the solution moving needle, so that the control of glue dispensing quantity can be controlled; the micro adjustment of the size of the glue spot can be realized by controlling the micro distance between the front end of the solution moving needle and a glue dispensing surface; and the glue dispensing can not be limited within the vertical direction, and the micro glue dispensing can be realized at the any directions of the space by changing the turning angle of a turning pair.

Description

technical field [0001] The invention relates to the field of dispensing technology, in particular to an ultra-micro dispensing device and method for micro-assembly. Background technique [0002] Dispensing technology has a wide range of applications, from semiconductor packaging industry, integrated circuit industry, SMT / PCB assembly industry to general industrial welding, injection and sealing dispensing, dispensing technology plays a vital role. The dispensing technology developed at present can be divided into contact dispensing and non-contact dispensing according to whether the needle is in contact with the substrate. Contact dispensing includes time-pressure type, screw pump type, piston type and needle transfer technology. . Jet dispensing is a non-contact dispensing technology developed in recent years. The traditional contact dispensing methods have deficiencies in the control of the amount of glue, and it is difficult to achieve high-consistency dispensing, such ...

AI Technical Summary

Problems solved by technology

The traditional contact dispensing methods have deficiencies in the control of the amount of glue, and it is difficult to achieve high-consistency dispensing, such as time-pressure and needle transfer; although screw pump and piston dispensing can Get consistent spotting, but precise adjustments are cumbersome, expensive and complex to clean

The needle tube used in the traditional contact dispensing method cannot be replaced, and the size of the sample can only be controlled by adjusting the glue or the parameters of the dispenser itself, which limits the accuracy of the sample to a certain extent. Diameter range

Although jet dispensing has the advantages of fast dispensing speed and good dispensing consistency, it must have a temperature control device, and it is necessary to control the change of colloidal viscosity, and it is difficult to apply to the case of high viscosity glue

At present, the micro-volume non-contact dispensing machine developed in Germany is in the leading position in the world, and the minimum diameter of the dispensing can reach 100um to 350um. However, when the viscosity of the glue becomes larger, micro-dispensing cannot be controlled.

There is no record in the domestic and foreign literature about the non-contact micro-dispensing method with the minimum injection volume of several fl

Images