Under what circumstances can ICT probes be replaced5

The number of probes to be used depends on the model of the probe and the company's regulations on fixture maintenance (our company is 2w times a change); During monthly maintenance, replace some parts of the elasticity that are not good and deformed;

There are also continuous errors in the usual test, you must first look at the probe of the component, whether the elasticity is not good, deformation, or the probe is broken, the probe model is wrong, etc.

The probe has an effective number of contacts, which is about 4000 times. Due to the cost, it can be used until the elasticity cannot be replaced; If there is more rosin in the PCB, it will also shorten the service life.

If there is a problem at one point, you can change the needle. It is also possible to change all of them once on a regular basis.

Don't go to work at Flex on the road, the owner of the testing department, Angel Zhao, is a fool.

I'm just engaged in ICT, I'm a Flex ICT engineer, I've been working for several years, or you can go to Jabil in Caohejing, I may have to leave now, because Zhao Anqi, the boss of the Malu testing department, is a stupid bird who holds grudges and is cautious, and takes care of his mother-in-law engineer"Allowable consumption",Made, this mother, has converged a lot of benefits for **businessmen,And engaged in many defective products on printer consumables as ** sold for replacement。。。

1. If it is used more than 8w times, it is recommended to replace it.

2. The elasticity is not good to be replaced, otherwise it is easy to break the board.

3. The particularly black ones should be replaced, which will affect the stability of the test.

At present, the quality and price of domestic probes such as (Huarong, Zhonghua, Muwang, etc.) are generally cheaper, but the quality is not as superior to imported probes such as (INGUN, QA, ECT, LH, etc.). If you want to be cost-effective, it is recommended to choose (ingun, lh).

Hello! Ingun's probes can almost be said to be the best quality in the field of testing, and now there are their original subsidiaries in China, and the original quality is still trustworthy.

The new technology is used with the German ingun probe.

BT's rotten to death! I can't measure the bend of the needle for a long time, and the inelastic is inelastic!

Ingen's is OK, it is produced exclusively by Jiangsu Kunshan Weidian Electronics! The needle is really good!

There is also a Qa needle, the quality is also good, but it is too expensive!

The height of 100mil refers to the spacing between the pad points and the points of the PCB board, and the corresponding probe can be selected according to this.

It's not that you measure the diameter of the probe bench, but the PCB board.

If you're using an HP3070 tester, you don't have to worry about where and how big test probes to use.

The types of test beam delay probes include PCB probes, ICT function test probes (automotive wiring harness test probes, battery probes, current and voltage probes, switch pins, capacitive polarity pins, high-frequency probes), BGA test probes, etc.

According to the different origins, it is divided into the United States QA probe, the United States ECT probe, the United States IDI probe, etc., the German INGUN probe dust probe, the German PTR probe, etc., the South Korean Leenon probe, the Taiwan CCP China probe, the Taiwan UC Youchuan probe, etc.

The quality of the test probe is mainly reflected in the material, plating, spring, casing diameter accuracy and manufacturing process. The test probe is divided into three types: domestic, Taiwan, Hong Kong, and imported, and many domestic products are made of imported materials.

Any position can be, as long as it is connected to the NET, there are the following problems to pay attention to 1, the spacing between the two adjacent pads should be large enough, preferably more than 2mm, because the ICT probe has 100mil, 75mil, 50mil and other specifications, if the spacing is too small, use a small probe, the cost will be higher, and the spacing should not be less than.

2. Be far away from the component, especially the component of the plug-in, the probe is too close to the component, and it will touch the probe 3, far away from the tooling hole.

For the rest, you can see for yourself.

1. No.

2. TP (test point), the diameter should be greater than 1mm, about 2mm.

3. The distance between TP and TP, devices, holes, lines, etc., should be neatly arranged and beautiful.

4. Consider the feasibility of production, and don't be blocked by devices, etc., and can't or can't put probes.

ICT testing instability has:

1.Whether the test probe is offset from the test point;

2.The test point of the test plate to be tested is dirty and the contact is not good! Require cleaning;

3.Test fixture test daily maintenance, require cleaning of probes, fixture carrier plates!

4.Optimization of test programs.

Hope it helps, thank you!

PCB probe is mainly used for testing, providing excitation voltage for test devices or connecting power supply and location, there are many types of pins, and the needles of Intun in Germany are widely used!!

Positioning needles and positioning columns, as the name suggests, are used for positioning. Mainly in the fixture, generally there will be positioning holes on the PCBA, officially because of the role of the positioning pin and the positioning column to make the needle on the fixture more accurate on the PCBA, otherwise it will break the board!!

The ICT probe is mainly used to find the corresponding test point, for example, sometimes the ICT contract test cannot be tested during the test, and it will report the relevant test point, then we will use the ICT probe to find the point to determine whether it is the problem of the device needle bed or the problem of the corresponding needle on the fixture.

I haven't heard much about double-ended pins and battery pins, but the battery pins are supposed to be to connect the battery and the circuit!!

Probes are DNA probes and oligonucleotide probes.

Probe labeling methods include: random primer labeling, incision translation method, and end labeling method.

Incision translation is the incision generated3'Hydroxyl and 5'Phosphate group, DNA extension synthesis3'end, 5'The ends are degraded by small fragments, and the notch sites follow the double strands to 3'End-to-end shifting is a technique for introducing radiolabeled nucleotides into DNA molecules in vitro.

Random primer synthesis is to combine oligonucleotide primers with DNA templates, and under the action of Klenow enzymes, DNA probes are synthesized.

The end-labeling method catalyzes the addition of labeled DNTPs to the ends of single- or double-stranded DNA by terminal deoxyribonucleotidyl transferases.

Considerations for probe synthesis.

The length of the synthetic probe is generally between 20 and 50 nucleotides. If the synthesis is too long, the cost is high, and the polymerase synthesis error is prone to occur, the hybridization time is long, and the specificity is reduced if the synthesis is too short.

The base composition G-C should contain 40% 60%, and no more than 4 consecutive repeats of one base to avoid non-specific hybridization.

There should be no complementary region in the probe sequence, so as not to produce a "hairpin" structure and affect hybridization.

In short, a good probe can only be confirmed in practice.

Type: DNA molecule probe, RNA molecule probe, protein molecule probe.

Methods: Isotope labeling method, fluorescein labeling method.