Before cleaning, because the surface is covered with particles, the existence of residual water marks cannot be seen with the naked eye.

Put it in the dust cleaning agent PTC04 (100%), heat it to 45°C, and clean it with 40KHz, 50W/2L ultrasonic wave for 5 minutes. After rinsing with pure water, it was found that the surface was covered with water marks (or water mark-like coating). The original dirty shape has been improved, and water marks (or water mark-like coatings) can be seen more clearly.

Take it out, and then heat it to 50°C with the dust cleaning agent PTC13, and clean it with 40KHz, 50W/2L ultrasonic wave for 5 minutes.

After rinsing with pure water, it was found to be completely cleansed.

Suggestions and discussions:

5.1 Microdust cleaner PTC04 cannot clean the water mark (or water mark-like coating) on this glass.
5.2 Use micro dust cleaning agent PTC13, heat to 50°C, and clean with 40KHz, 50W/2L ultrasonic wave for 5 minutes. Can be washed completely.
5.3 Microdust cleaning agent PTC13 can effectively clean organic polymer deposits, and can also decompose some inorganic films. And can generate interface potential (zeta potential) greater than -45mv. Make the glass surface and the particle form an effective repulsive negative voltage. It can effectively remove grease and particle pollution on the glass.

Before cleaning, there was irregular oxide distribution on the surface of the molybdenum sheet, and the overall appearance was dull in color. Observed under a microscope, there is a circle of deep oxidation marks along the edge cutting line.

Place in 80% PTC13, 50°C, 40KHz ultrasonic wave, 100W/L, and shake for 3 minutes.

The surface was found to have regained its metallic luster. There was a circle of deep oxidation marks along the cutting line of the edge, which has also disappeared.
(The left side of the photo below is before cleaning, and the right side is after cleaning)

Repeat for one slice. (The photo on the left is before cleaning, and the right is after cleaning)

Change to molybdenum etchant OS02. It was found that soaking for a short period of time restored the luster slightly, but as the soaking time was prolonged, the surface color became duller instead.

(The left side of the photo below is before cleaning, and the right side is after cleaning)

conclusion and discussion:

6.1 Micro dust cleaning agent PTC13 is a cleaning agent suitable for molybdenum sheet of radio frequency cooling components.
6.2 Although PTC13 can restore the metallic luster of the molybdenum sheet, if the surface oxidation color of the molybdenum sheet is darker, there will still be rough traces after cleaning. It is recommended that after wire cutting, it should be cleaned immediately with microdust cleaner PTC13, then washed with water and dried. Avoid molybdenum flakes being soaked in cutting oil for a long time to produce oxidation spots of different shades.

After the glass panel PET sensor module is torn off, the silicone residue remains on the tempered glass before cleaning.

After pre-soaking for 1 hour with microdust cleaner PTC13 at 50°C, then wash with 50°C microdust cleaner PTC13, 50W/L, 40KHz, ultrasonic waves for 10 minutes, then spray clean with pure water.

Repeat the test. After pre-soaking for 1 hour with microdust cleaner PTC13 at 50°C, wash with 50°C microdust cleaner PTC13, 50W/L 40KHz, ultrasonic waves for 10 minutes, and then spray clean with pure water. Observing under strong light, it is found that the silicone rubber has been completely washed, and there is no residual glue left.

The surface of the Micro SD card is sealed with epoxy black glue before peeling off the black package.

The epoxy package on the surface is peeled off with a chemical.

Observed with a microscope, it can be seen that a layer of light brown gelatinous substance is attached to the surface of the wafer.

Put the bare chip into the silicone cleaning agent PTC13 heated to 70°C, shake it for 30 seconds, take it out, and rinse it with pure water.
It was found that the light brown gelatinous substance attached to the surface had been cleaned.

Before washing, look front and back.

Observe with a microscope at 100 times magnification: it is found that the surface is covered with carbon black, dust and dirt.

Take a piece of copper, put it in the dust cleaning agent PTC13 (100% stock solution) at room temperature (25°C), and clean it with 40Khz, 100W/L ultrasonic wave for 180 seconds. Take out the flush water, rinse and remove the patticle. Then soak in the copper oxide reducing agent COR01D for about 1 minute to reduce copper oxide. Observe with a microscope at 100 times magnification: It is found that the carbon black and dust on the surface have been removed. However, it was observed that part of the adhesive film that fixed the copper sheet for laser cutting remained on the copper probe.

Repeat the test. Take another piece of copper, put it in the dust cleaning agent PTC13 (100% stock solution) at room temperature (25°C), and clean it with 40Khz, 100W/L ultrasonic wave for 180 seconds. Take out the flush water, rinse and remove the patticle. Then soak in silicon dioxide film cleaning agent SMC04 for about 1 minute to remove copper oxide. Observe with a microscope at 100 times magnification: It is found that the carbon black and dust on the surface have been removed. Film residue was also not observed.

Suggestions and discussions:

Before cleaning, take 0.4mm borosilicate glass and observe it under strong light in a clean room. There are many particles attached to the surface, and it is difficult to see the white fog phenomenon on the glass.

Rotate the angle, you can vaguely see a faint uneven white fog phenomenon.

Put it in the dust cleaning agent PTC13 (70%), heat it to 40°C, and clean it with 40KHz, 50W/2L ultrasonic wave for 5 minutes.

After rinsing with pure water, it was found that the surface particles had been completely removed.

Rotating at various angles, it was found that the original light uneven white mist phenomenon has completely disappeared.

The phenomenon of non-uniform white fog cannot be observed even when reflecting light at various angles.

Repeat the test: Take another piece of 0.3mm borosilicate glass and observe it under strong light in a clean room. There are also many particles attached to the surface, and it is difficult to see the white fog phenomenon on the glass.

Put it in the dust cleaning agent PTC13 (70%), heat it to 40°C, and clean it with 40KHz, 50W/2L ultrasonic wave for 5 minutes. After rinsing with pure water, it was found that the surface particles had been completely removed.

Rotating various angles, no uneven white fog phenomenon can be found.

Repeat the test: Take another piece of 0.4mm borosilicate glass and observe it under strong light in the clean room. There are also many particles attached to the surface, and it is difficult to see the white fog phenomenon on the glass.

置於微塵清洗劑PTC13 (70%)，加熱到40℃，以40KHz, 50W/2L超音波清洗5分鐘。以純水沖洗後，發現表面particle已完全去除。

旋轉各種角度，找不到任何不均勻的白霧現象。

Before washing, look. Observation with a microscope can clearly see the black dirt on the tip of the probe.

Place the probe in the probe cleaning agent PTC13 at 70°C for 2 minutes.

Take it out and rinse with water. After washing, observe with a microscope. It was found that most of the dirt on the tip of the probe had been removed, revealing a metallic luster.

Repeat the test. Take another probe, before washing.

Extend soak time. Place the probe in PTC13 probe cleaning agent at 70°C, soak for 5 minutes, take it out, and rinse it with clean water. Observe under a microscope.

Suggestions and discussions:

5.1 From the results of this experiment, the probe cleaning agent PTC13 is an effective cleaning agent. However, it is still necessary for the customer to actually test whether the probe impedance value after cleaning meets the requirements.
5.2 This cleaning test only involves simple heating and soaking. Will the effect be better if it is cleaned with an ultrasonic wave or a cloth brush? It needs to cooperate with the equipment manufacturer for further testing.

Before washing, the appearance can clearly see the black dirt.

Use the dust cleaning agent PTC13, at room temperature, 40KHz, 50W/L ultrasonic cleaning for 2 minutes.

Before washing, look. Observation with a microscope can clearly see the black dirt on the tip of the probe.

Place the probe in the probe cleaning agent PTC13 at 70°C for 2 minutes.

Take it out and rinse with water. After washing, observe with a microscope. It was found that most of the dirt on the tip of the probe had been removed, revealing a metallic luster.

Repeat the test. Take another probe, before washing.

Extend soak time. Place the probe in PTC13 probe cleaning agent at 70°C, soak for 5 minutes, take it out, and rinse it with clean water. Observe under a microscope.

Suggestions and discussions:

5.1 From the results of this experiment, the probe cleaning agent PTC13 is an effective cleaning agent. However, it is still necessary for the customer to actually test whether the probe impedance value after cleaning meets the requirements.
5.2 This cleaning test only involves simple heating and soaking. Will the effect be better if it is cleaned with an ultrasonic wave or a cloth brush? It needs to cooperate with the equipment manufacturer for further testing.