What is a probe?
As an information detection tool, a probe card is a test interface, which mainly tests the bare chip, connects the tester and the chip, and tests the chip parameters by transmitting signals.
The probe card is used before the IC is packaged. The probes on the probe card are directly contacted with the pads or bumps on the chip to draw out the chirp signal, and then cooperate with the peripheral testing instruments and software control to achieve the purpose of automatic measurement. . For example, a WiFi probe is a kind of information detection tool. This probe technology is based on WiFi detection to identify smartphones, tablets, and laptops that have WiFi enabled near the wireless access point. Even if the user is not connected to WiFi, the WiFi probe will identify useful information and obtain the device address.
To avoid information leakage, users can turn off the WiFi connection function after going out, do not easily connect to public WiFi, and regularly change the home WiFi account password.
Biological single-stranded DNA tools
What are the probes for biological applications? It can be called a DNA probe. DNA probes are the most commonly used nucleic acid probes, classified as single-stranded or double-stranded DNA, labeled with radioisotopes (usually phosphorus-32), fluorescent dyes, or enzymes (such as horseradish peroxidase).
Under appropriate pH, temperature, and ionic strength, the DNA probe can hydrogen bond with the complementary unlabeled single-stranded DNA or RNA in the sample to be tested by utilizing the high accuracy of molecular denaturation, renaturation, and base complementary pairing. combine to form a double-stranded complex.
Under stringent conditions (high pH, high temperature, low ionic strength), the two strands of an imperfectly matched hybrid will dissociate, while a perfectly matched hybrid will remain double-stranded.
After the unpaired probes are washed away, the results of the hybridization reaction can be detected by detection systems such as autoradiography or enzyme-linked reaction.
Test PCBA Tools
What is a probe? The probe is a kind of test needle for testing PCBA in electronic testing. Its surface is gold-plated and it is a high-end electronic component. Different probe materials have different performances. Probes made of W and RW are easy to shift and have general elasticity. They are easy to stick to gold chips and are easy to wear. They need multiple cleanings and have a normal life. The probe made of A+ material has better elasticity, is not easy to shift during the test, does not stick to gold chips, and is free of cleaning, so it has a longer life.
According to the purpose of electronic testing, probes can be divided into:
Optical circuit board test probe: circuit board test before components are not installed and only open circuit and short circuit test probes;
Online test probe: the test probe after the components are installed on the PCB circuit board;
Microelectronics Test probes: wafer test or chip IC test probes.
The type of test probe can be divided into:
1. ICT probe: mainly used for online circuit tests and functional tests, also known as ICT test and FCT test, is a kind of probe with many applications.
2. Interface probes: non-standard probes, generally custom-made for a few customers who do large-scale testing machines, are used to test the contact points and surfaces of the machine and the test fixture.
3. Microprobe: The distance between the centers of the two test points is generally 0.25mm to 0.76mm.
4. Switch probe: A single probe of the switch probe has two currents.
5. High-frequency probe: used to test high-frequency signals, some with shielding rings can test within 10GHz, and 500MHz without shielding ring.
6. Rotary probe: The elasticity is generally not high, because its penetration is very strong, and it is generally used for PCBA tests processed by OSP.
7. High current probe: the diameter of the probe is between 2.54mm-4.75mm. The maximum test current can reach 39amps.
8. Semiconductor probe: the diameter is generally between 0.50mm-1.27mm. Bandwidth greater than 10GHz, 50Ω characterisTIc.
9. Battery contact probe: generally used to optimize the contact effect, with good stability and long life.
10. Automotive wiring harness test probe: professionally used for on-off detection of automotive wiring harness, the diameter is between 1.0-3.5mm, and the current is 3-50A.
In addition to the above types of probes, there are also less commonly used temperature probes, Kelvin probes, etc.
computer program tool
Speaking of probes? A probe is also a web script. The probe can implement script files for detecting sensitive server information through web programming languages (ASP, PHP, ASP.NET, etc.). It is usually used to detect website directory, server operating system, number of CPUs, session timeout, server session variables, server ApplicaTIon variables, component support, computing speed, disk read and write speed, and network connection speed.
archaeological tools
Probes are also used by archaeologists when they go down to the soil layer, so what are the probes used as archaeological tools? The probe used for archaeology is also known as the rod. The probe is connected to the probe rod, which can be used to detect and obtain the soil quality of the underground soil layer to understand whether there are ancient tombs underground. Therefore, the probe is also a convenient and quick archaeological tool.
What is a probe? On a large scale, probes are mainly used in these fields and have different roles and performances. In a certain field, probes can also be subdivided into different types with different performances. It is undeniable that probes are irreplaceable in any field.