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Old 01-22-2019, 09:23 PM   #1
capwizard
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Default Need help to finish my project COF portable Bounding machine.

Need help to finish my project the world's first portable COF Bounding machine.

my idea is use same theory like hair straightener to make a COF portable Bounding machine.

COF Bounding needs temperature, pressure, and Precise alignment and the most important.....Anisotropic Conductive Film tape...ACF tape which price has been dropping become more affordable.

i try to use two piece flat glasses (glass microscope slides. ) to hold COF TAB in between with spring give the pressure.......but i don't know how to heart up the glasses. i thought to put heating element inside the glasses but at same time they need to be transparent for COF position alignment.....any help would be appreciated

COF bounding ACF tape methods.

Traditional heating method:
3M Anisotropic Conductive Film (ACF) Interconnect Solutions
Bonding Temperature (C) 195 to 210
Bonding Time (seconds) 10 to 20
Bonding Pressure (MPa) 3 to 5

Ultrasonic vibration method: No one has done this just my imagination.

Room temperature ACF bonding process using ultrasonic vibration for chip-on-board and flex-on-board applications.

Ultrasonic Solder Ironing Equipment - YES 40Khz100W
https://www.youtube.com/watch?v=OHniu1Fwpwc

Ultrasonic Soldering
https://www.youtube.com/watch?v=B9fbYO79988

or we can use laser to bond COF to screen?
Laser method: No one has done this just my imagination.

BEAUTIFUL! Micro Laser Soldering System - AWESOME! Cool Japan Technology
https://www.youtube.com/watch?v=KnyB9btlhS8


Last edited by capwizard; 01-22-2019 at 10:25 PM..
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Old 01-23-2019, 06:42 AM   #2
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Default Re: Need help to finish my project COF portable Bounding machine.

Induction coil method: No one has ever done this before just my imagination.

after we put LCD screen and COF in between glass microscope slides, my idea is use induction coil, non-touch, heat up the bounding ?
The key is because there is no contact, so it wont vibrate and lost precision.

-----------------------------------------------------------------------------
References:

Induction Coils - How to turn them into powerful business tools
https://www.youtube.com/watch?v=07nACtdjZ9o

Chinese 1000 W ZVS Induction Heater VS. Home Made
https://www.youtube.com/watch?v=gNL4H5fC6AY

How to make a small and powerful induction soldering iron
https://www.youtube.com/watch?v=vgYLR1Rp5tI

Induction soldering of 25 mm2 twisted electrical wires
https://www.youtube.com/watch?v=Abfj6JaXvZY


Induction cooking heats a cooking vessel electrically by magnetic induction, instead of by radiation or thermal conduction from an electrical heating element, or from a flame.

must be ferromagnetic. The coil is mounted under the cooking surface, and a high frequency (e.g. 24 kHz) alternating current is passed through it. The current in the coil creates a dynamic magnetic field. When an electrically conductive pot is brought close to the cooking surface, and the pan is thicker than the skin depth,

I have one question is this must be ferromagnetic but one of the videos above he did used induction coil to solder the copper wires?

Last edited by capwizard; 01-23-2019 at 07:37 AM..
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Old 01-27-2019, 10:39 PM   #3
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Default Re: Need help to finish my project COF portable Bounding machine.

Cold welding method: this one needs carry LCD screen to the outer space. COF and metal coated LCD screen will automatically cold weld, fusing together.

Cold Welding In Vacuum?
https://www.youtube.com/watch?v=GtcuURSYgvo

Vacuum Welding - Metal Fusing in Space
https://www.youtube.com/watch?v=1nArb8in4dg

Vacuum Welding - Metal Fusing in Space
https://www.youtube.com/watch?v=1nArb8in4dg

Solar energy method: put COF in between two prices microscope slides, adjust position with LCD screen then use magnifying glass focus on it and finish the welding work. most likely i will accomplish COF bounding with this.
Attached Images
File Type: jpg XWlpP.jpg (54.2 KB, 3 views)

Last edited by capwizard; 01-27-2019 at 10:52 PM..
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Old 01-29-2019, 09:37 AM   #4
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Default Re: Need help to finish my project COF portable Bounding machine.

The last two whichever I can think of are....

Quartz Infrared heating element method:
This maybe alternatively to solar if it is a cloudy day or rainy day.

Ceramic Heating Element method:
A lots of hair straighteners already use ceramic heating elements

Is there anybody can think of another method?
Attached Images
File Type: jpg cermic-elements-1.jpg (514.2 KB, 1 views)
File Type: png Radiant.png (89.9 KB, 2 views)

Last edited by capwizard; 01-29-2019 at 09:41 AM..
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Old 01-30-2019, 12:03 AM   #5
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Default Re: Need help to finish my project COF portable Bounding machine.

I think induction heating would induce high voltages and could damage components. It's a very strong B-field.

These guys use a hot bar loop, which reminds me of a soldering gun:
http://www.youtube.com/watch?v=2iKdFM6xRpY

This LCD screen repair is all hot air, then solvent, then new tape:
http://www.youtube.com/watch?v=t36YT7-5GTY
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Old 01-30-2019, 07:29 AM   #6
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Default Re: Need help to finish my project COF portable Bounding machine.

Quote:
Originally Posted by redwire View Post
I think induction heating would induce high voltages and could damage components. It's a very strong B-field.

These guys use a hot bar loop, which reminds me of a soldering gun:
http://www.youtube.com/watch?v=2iKdFM6xRpY

This LCD screen repair is all hot air, then solvent, then new tape:
http://www.youtube.com/watch?v=t36YT7-5GTY
I tried to import one COF bonding machine to United States but I figure out all that weight are the grass and the metal frame, all machines are monopolized by China, and the technology of this machine has not been updated.

The working principle of the whole machine is the same as the temperature-adjustable soldering iron or hair straightener and I don't believe we need a air compressor attach to the machine to do the job.

For me this COF bonding machine should not bigger than a FoodSaver.

Precise alignment, new ACF tape, temperature and pressure are the most important factors which are not too difficult to accomplished.

Last edited by capwizard; 01-30-2019 at 08:25 AM..
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