News

HDI circuit board manufacturing factory welcomes you - Juding Circuit Technology

2019-09-17 17:52:04 450

High-precision HDI circuit board blind buried holes, technology is becoming more and more important in the development of today's PCB board industry. High precision means that the result of "small line, small hole, narrow line width and thin board" produced by the circuit board will inevitably bring high precision. Take the line width as an example: O.20mm line width, and produce O.16 according to regulations. -0.24mm is qualified, the error is (O.20 soil 0.04) mm; and the line width of O.10mm, the same error is (0.10±O.02) mm, obviously the accuracy of the latter is doubled. Analogy is not difficult to understand, so the high precision requirements are not discussed separately. But it is a prominent problem in circuit board production technology.

Printed circuit board HDI high-density technology overview, HDI circuit board production technology application


1: Fine wire technology The future high-density line width/space will be from 0.20mm-O.13mm-0.08mm-0.05mm to meet SMT and Multichip Package (MCP) requirements. Therefore, the following technology is required.


(1)Since the line width of the HDI circuit board is very thin, thin or ultra-thin copper foil (<18um) substrate and fine surface treatment technology have been used.

(2)The current HDI circuit board production has adopted a thin dry film and wet film process, and a thin and good quality dry film can reduce line width distortion and defects. The wet film fills up small air gaps, increases interfacial adhesion, and improves wire integrity and accuracy.

(3)HDI circuit board line is etched using an Electro-deposited Photoresist (ED). Its thickness can be controlled in the range of 5-30/um, which can produce more perfect fine wires. It is especially suitable for narrow ring width, ringless width and full plate plating. At present, there are more than ten ED production lines in the world.


(4) HDI circuit board line imaging uses parallel light exposure technology. Since the parallel light exposure can overcome the influence of the line width variation and the like of the oblique light of the "dot" light source, a fine wire having a line width and a smooth edge can be obtained. However, parallel exposure equipment is expensive, has a high investment, and requires work in a high cleanliness environment.


(5) HDI board inspection adopts Automatic Optical Inspection Technology (AOI). This technology has become an indispensable means of detection in the production of fine wires, and is rapidly being promoted and applied.


6-34 high-density HDI circuit board professionally produced by HDI circuit board manufacturers

The functional holes of the printed circuit board for surface mounting of microporous technology are mainly used for electrical interconnection, thus making the application of microporous technology more important. The use of conventional drill materials and CNC drilling machines to produce micro-holes has many failures and high costs. Therefore, the high density of printed boards is mostly done in the thinning of wires and pads. Although great achievements have been made, their potential is limited. To further improve the densification (such as wires less than 0.08 mm), the cost is urgent. Lit, thus turning to micropores to improve the densification.


Juding Circuit Technology: is a professional PCB circuit board manufacturer, providing you with: PCB prototype, batch board, 1-34 layer PCB board, TG board, HDI board, Rogers board, microwave board, RF board, radar board , thick copper foil board, PCB manufacturing and production of various processes and materials, welcome to consult the staff for more details!