ibtime.org
  • Home
    • Home – Layout 1
    • Home – Layout 2
    • Home – Layout 3
  • News
  • Politics
  • Business
  • National
  • Culture
  • Opinion
  • Lifestyle
  • Sports
No Result
View All Result
  • Home
    • Home – Layout 1
    • Home – Layout 2
    • Home – Layout 3
  • News
  • Politics
  • Business
  • National
  • Culture
  • Opinion
  • Lifestyle
  • Sports
No Result
View All Result
ibtime.org
No Result
View All Result
Home Technology Tips

Advantages of 3D measurement in solder paste control systems

admin by admin
February 17, 2022
in Technology Tips
0
Advantages of 3D measurement in solder paste control systems
0
SHARES
1
VIEWS
Share on FacebookShare on Twitter

Solder paste application quality control (SPI) has in the past taken a lower priority than automatic solder joint inspection (AOI) systems. While the AOI solder joint system detects defects only at the end of the production line, the inspection of the solder paste immediately after its application makes a significant contribution to the improvement of the technological process. Although the inspection of finished products is inevitable anyway, the main goal of every manufacturer is to produce a quality product without the cost of repairing it. To achieve this result, it is necessary to control and manage each stage of the production process. Poor application of solder paste is often the root cause of defects that will appear in subsequent stages of production. The soldering process itself does not cause this defect, but only manifests it.

Table of Contents

  • Benefits of 3D measurement in application control systems
    • Is random control of solder paste application sufficient?
    • Influence of Aperture Size on Imprint Efficiency
    • 2D or 3D inspection?
    • Multi-frequency moire method

Benefits of 3D measurement in application control systems

Is random control of solder paste application sufficient?

Today there are product lines that include a printer with built-in 2D solder paste inspection and a standalone SPI. However, to maintain the speed of the printer, the built-in inspection system only inspects a few areas of solder paste application; The stand-alone control section only performs random checks, which cannot guarantee the absence of a defect on each board.

Only checking the entire surface of the board will reveal random defects, and only inspection of the entire series (each board) will reveal deviations in the operation of the printer. For example, a trend towards a decrease in the amount of solder paste applied over the entire series indicates fouling of the apertures.

Influence of Aperture Size on Imprint Efficiency

As electronic assemblies get smaller and the mounting becomes more compact, the size of stencil apertures decreases and their number steadily increases. Different sizes of stencil apertures affect the so-called transfer coefficient. The smaller the hole size, the less solder paste is transferred from the stencil apertures to the PCB.

Let us compare two round holes of the same stencil with a diameter of 700 and 270 µm with the same stencil thickness of 100 µm and evaluate the efficiency of the imprint.

It is easy to see that the application area varies from 75 to 100%, and the volume in all cases is more than 90%, which is a completely satisfactory result. For an aperture with a diameter of 270 μm, the picture is somewhat different. The application area ranges from 60 to 120%, and the volume – from 50 to 100%. The implication of these measurements is a priori that at small apertures, quality control of the paste application becomes a key factor in ensuring the quality of the solder joint.

2D or 3D inspection?

SPI vendors offer 2D and 3D solder paste control systems. 2D inspections work by comparing different shades of gray. This requires a lot of adjustment, depending on the color of the printed circuit boards, and does not provide accurate volume information.

3D systems are based on PCB and solder paste inspection. Two technologies can work in 3D inspection systems today – a laser measurement method and a multi-frequency method. Laser measurement reveals many defects that can be missed during a normal 2D inspection. But this technique has a number of limitations, for example, the inability to measure the volume of the indicated area, the measurement error due to the large thickness of the laser beam, and the sensitivity of the laser to the color of printed circuit boards.

Multi-frequency moire method

The essence of the multi-frequency moire method is to measure the height of each pixel of the inspected object. The measurement principle: light directed at an angle to the object from several projections resembles a diffraction grating. Due to the offset of each grating, we get the lines projected on our product. If the surface has any unevenness or relief, then the lines of the projected grating will shift.

The multi-frequency moiré technology makes it possible to measure the height of an object at each point (or in each pixel) with an accuracy of 1 micron by the shift of the fringes. Knowing the height at each point of the inspection area, we can determine the area of ​​the object, and knowing the height and area, we can get the volume of the inspected object. It follows from all this that, unlike classical systems, 3D measurement using the multi-frequency moiré method allows not only to distinguish the volume (to determine the presence or absence of an object), but to obtain mathematically accurate measured data on the volume in numbers.

No related posts.

Tags: 3D measurementsolder paste
admin

admin

Related Posts

Best Video Editor for Vlogs in 2022 Recommended – Wondershare UniConverter
Technology Tips

Best Video Editor for Vlogs in 2022 Recommended – Wondershare UniConverter

May 25, 2022
What are the very basic and major things that you need to know about the concept of runtime application self-protection systems?
TECH

What are the very basic and major things that you need to know about the concept of runtime application self-protection systems?

March 30, 2022
free movie download 2022
Technology Tips

Complete Guidance About Tamilyogi 2022

March 22, 2022
Next Post
The Benefits Of Enduring A Magento Development Agency Over A Freelancer

The Benefits Of Enduring A Magento Development Agency Over A Freelancer

Online Quran Teaching

The Benefits of Quran Study on the Internet

Why does my HP printer keep saying cartridge problem?

Why does my HP printer keep saying cartridge problem?

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Follow Us

  • 87.1k Followers

Recommended

Epson error 0xf1 / Brother printer won t connect to Wifi

Which is the Best Printer for Your Home and Office?

1 year ago
Solar Batteries – Working Efficiently To Store Every Bit of Energy!

Solar Batteries – Working Efficiently To Store Every Bit of Energy!

1 year ago
serum boxes

Surprising facts about serum boxes that no one told you

1 year ago
custom-stickers-holographic

The benefits of using custom stickers holographic for any product.

1 year ago

Instagram

    Please install/update and activate JNews Instagram plugin.

Categories

  • Apps/Softwares
  • Automotive
  • Beauty
  • BUSINESS
  • Culture
  • Digital Marketing
  • EDUCATION
  • Entertainment
  • Fashion
  • Finance
  • Food & Drink
  • Gadgets
  • Gaming
  • HEALTH
  • Home
  • Home Improvement
  • LIFESTYLE
  • Marketing
  • National
  • News
  • Opinion
  • Politics
  • Real Estate
  • Review
  • SEO
  • Social Media
  • SPORTS
  • TECH
  • Technology Tips
  • Travel
  • Uncategorized
  • World

Topics

#fashion #homedecor #homeimprovement #interiordesign 2018 FIFA World Cup 2018 League Asian Games 2018 Balinese Culture Bali United benefits of copper pipes Binayah Real Estate Dubai birthday gifts Budget Travel Business Buy Property with Bitcoin Dubai Buy Property with Crypto Dubai Car Service New York car wash Chopper Bike content writing services credit card Custom Boxes Custom Boxes With Logo custom display boxes custom donut boxes Custom Packaging Boxes digital marketing Erectile Dysfunction fitness flyttstädning health healthcare instagram iOS Istana Negara Market Stories Modvigil 200 National Exam NFT Marketplace Property Management Services in Dubai Real Estate Seo Sleep Tech Visit Bali
No Result
View All Result

Siteoutreach.com

Highlights

How to invest in real estate with a self-directed IRA

Compression Garments to Reduce Cellulite on the Legs

BEST TIPS TO GET RID OF DANDRUFF

What are Online Slots with Free Spins?

What are progressive slots? 

Things To Consider Before Trying a Neem Wash Face

Trending

Tips to Choose Women’s Wedding Rings
LIFESTYLE

Tips to Choose Women’s Wedding Rings

by admin
May 25, 2023
0

Perhaps one of the most important types of rings you will need to purchase is a wedding...

Improve your health with alternative medicine in Switzerland

Improve your health with alternative medicine in Switzerland

May 17, 2023
Find Your Paradise at These Luxury Vacation Rentals in Arizona

Find Your Paradise at These Luxury Vacation Rentals in Arizona

April 11, 2023
How to invest in real estate with a self-directed IRA

How to invest in real estate with a self-directed IRA

March 31, 2023
Compression Garments to Reduce Cellulite on the Legs

Compression Garments to Reduce Cellulite on the Legs

March 14, 2023
ibtime.org

Navigate Site

  • About
  • Advertise
  • Careers
  • Contact

Follow Us

No Result
View All Result
  • Home
  • Politics
  • News
  • Business
  • Culture
  • National
  • Sports
  • Lifestyle
  • Travel
  • Opinion