The properly and electrostatically measured taping materials are used for the components, but attention should be paid to the fact that there is some danger the parts absorb on the top
tapes to cause a failure in the mounting and the parts are destructed by static electricity (more than 1kV : 1J, 2A, 2B, 2E 0.5kV : 1E, Human Body Model 100pF 1.5kΩ) to change the
resistance in the conditions of an excessive dryness or after the parts are given vibration for a long time as they are packaged on the tapes. Similarly, care should be given not to apply the
excessive static electricity when mounting on the boards.
●
Ionic impurities such as flux etc. that are attached to these products or those mounted onto a PCB, negatively affect their moisture resistance, corrosion resistance, etc. The flux may
contain ionic substances like chlorine, acid, etc. while perspiration and saliva include ionic impurities like sodium (Na
＋
), chrorine (Cl
−
) etc. Therefore these kinds of ionic substances may
induce electrical corrosion when they invade into the products. Either thorough washing or using RMA solder and flux are necessary since lead free solder contains ionic substances.
Washing process is needed, before putting on moisture proof material in order to prevent electrical corrosion.
●
Please pay attention that the top of an iron does not direct touch to the components. There is a risk that may cause a change in resistance. Take care that another risk may happen that
the protecting coat is carbonized in an instant when touched directly by the top of the iron, also climatic-proof for electric corrosion or insulation of protecting coat may be dropped down.
Be sure not to give high temperature on the top of the iron as it will degrade the protecting coat.
●
Avoid storing components under direct sun rays, high temperature/humidity. Direct sun rays will cause quality change of taping and difficulty of keeping appropriate peeling strength. 5∼
35℃/35∼75%RH, there is no deterioration of solderability for 12 months, but take special care for storing, because condensation, dust, and toxic gas like hydrogen sulfide, sulfurous acid
gas, hydrogen chloride, etc. may drop solderability.
IKS01A3 provides a full set of sensor drivers and routines. Perhaps for compatibility, the code is very complex.
Whether you are a novice or an experienced user, it takes some time to understand the c...
Many thanks to EEWorld, RTTRenesas for the opportunity to review the much-anticipated CPK-RA6M4!
1. Hardware Appreciation
The packaging of RA6M4 is quite good, like a thick book.Unpacking, there are t...
[align=center][size=5][color=#8b0000]CB140-6G2C Core Board Pin Definition[/color][/size][/align][align=center][color=#ff0000]Question:[/color][/align][align=center][list] [*][color=#ff0000] Can you pr...
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This article is compiled from the Bluetooth Alliance official website In May 2020, the Bluetooth Alliance and DiiA (Digital Lighting Interface Alliance) announced their collaboration, one of the go...[Details]
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The soil fertilizer nutrient tester scientifically detects the nutrient details of the planting area. The soil fertilizer nutrient tester can quickly detect various nutrients in the soil, fertilizer...[Details]
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Industrial control computers are computer systems specifically used in the field of industrial automation. Their structural characteristics are mainly reflected in the following aspects:
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//************************************************ ************
//Title: 4x4 keyboard input function
// Function description: char gotkey(void)
// Input data from the 4*4 keypad and re...[Details]
In the overall design, the thermal power of the space containing the heat source should be fully considered and the corresponding heat dissipation form should be adopted; the heat in the cold light...[Details]
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Salt has the potential to change the way we store energy. (Photo courtesy of Malta)
U.S. billionaires Bill Gates, Michael Bloomberg and Jeff Bezos are among investors backing a...[Details]
introduction
Coal mine safety has always been the top priority in coal mine production. Ensuring underground voice communication, especially voice communication in emergency situations, is a prereq...[Details]
introduction
In actual work, in some cases, it may be necessary to analyze some data sent by the I2C interface. If the data is small, it is easier to solve. For example, you can directly s...[Details]
MEMS sensors
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