A flip-chip blue-white light digital tube and a production method thereof

Abstract

The invention discloses a flip-chip blue-white light digital tube and a production method thereof, A light-emitting technical field of a lamp, includes a PCB and flip-chip Blue-ray, The PCB is provided with two bonding pads, the bonding pad is provided with a solder paste, and the bottom of the flip-chip blue light chip is provided with two electrodes which are fixed by contacting with the solderpaste, wherein the PCB comprises two PCBs, the flip-chip blue light chip is arranged between the two PCBs, and the flip-chip blue light chip is in the shape of a cuboid. The digital tube provided by the invention has simple structure, A flip chip is soldered with solder, The firmness of the chip is higher than that of the fixed common chip, the electrode and the PCB are in full contact with conductivity better than that of the common chip, no wires are used, the bonding process is reduced, the production efficiency is improved, the throughput of the good product is increased, the risk of beingtouched by hands can be avoided when the product is tested and packaged, and the production efficiency and the yield are further improved.

Description

technical field [0001] The invention relates to the technical field of lamp lighting, in particular to a flip-chip blue and white digital tube and a production method thereof. Background technique [0002] As a new type of light source, the white light digital tube has the advantages of small size, long life, high reliability, easy modulation and integration, and is widely used in various fields. The most common and mature method of preparing white light digital tubes at home and abroad is to coat the blue chip with yellow phosphor powder to mix blue light and yellow light to generate white light. The traditional white light digital tube process is: substrate cleaning - solid crystal - wiring - test - dot phosphor powder glue layer - test - glue filling - assembly - high temperature baking - test - film, traditional The craftsmanship has some shortcomings. [0003] Defects in wiring process steps. The blue-ray chip is connected to the pad through aluminum wires. During th...

AI Technical Summary

Problems solved by technology

It is difficult to control the accuracy of the amount of glue when dispensing, and the phenomenon of inconsistent thickness of the colloid often occurs, resulting in low consistency of light output; due to the physical characteristics of silica gel, the glue layer is easy to form a semi-elliptical lens when dispensing, and the semi-circular structure helps It protects the chip, but the adhesive layer structure is in the form of medium thickness and thin sides, and it is difficult to maintain uniform thickness, resulting in uneven light output. At the same time, there will be blue light leakage on the side of the chip, resulting in a high color temperature of the white light digital tube.

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