Teflon Dispensing Needle: The "Master of Micromanipulation" in the Electronic World

In the process of the birth of smart phones, chips, circuit boards and other electronic devices, there are countless operations hidden that are precise to the micron level. Among them, the dispensing process is like ‘injecting’ and ‘applying medicine’ to electronic components, and Teflon dispensing needles, which are the core tools to complete these delicate operations. With its unique material advantages, it holds up a ‘precise world’ in the electronic field.

The chip package: to the ‘brain’ on the "protective clothing"

Chip as the ‘brain’ of electronic equipment, the internal structure is fragile and precise, packaging Each step in the process can not have the slightest error. In the bonding link between the chip and the substrate, it is necessary to use a very small amount of conductive adhesive or insulating adhesive to achieve a solid connection, and at the same time, the glue can not be allowed to overflow and contaminate the chip pins.

Teflon dispensing needles show their "micromanagement" power: the non-sticky inner wall makes the glue act like an "obedient elf", extruding precisely according to the set dosage and leaving no residual curing inside the needle. In 5G chip packaging, for example, the aperture of the needle tip may be as small as 0.1 mm, and the amount of glue dispensed at a time is controlled to a nanogramme scale - equivalent to one millionth of a drop of water. This precision not only ensures that the chip and the substrate are tightly fitted, but also prevents the glue from penetrating into the chip and causing short circuits, so as to provide the ‘brain’ with a well-fitting ‘protective coat’.

The circuit board coating: to the ‘blood vessels’ layer of "protective cover"

Circuit boards are covered with densely packed lines, as electronic equipment, "blood vessels ", once the moisture, ash or corrosion, may trigger equipment failure. Coating the surface of the circuit board with a layer of moisture-proof adhesive, insulating adhesive, is the key to extend its life. Ordinary needles are prone to glue pulling and uneven thickness when coating, while Teflon needles, with their low-friction characteristics, allow the glue to flow out evenly and form a flat protective film on the circuit board surface. For example, in the production of automotive electronic circuit boards, the need to deal with the engine compartment of the high temperature, oil environment, Teflon needles can accurately control the thickness of the glue in the 20-50 microns, neither too thick to affect the heat dissipation, nor too thin to lose the protective effect, so that "blood vessels" in the harsh environment is still unimpeded.

The electronic components fixed: to "parts" a "stable home"

In the mobile phone camera, sensors and other small electronic components in the assembly, the need to use glue to fix it on the motherboard. These components are tiny (some are only the size of a grain of rice), the fixing of which should be firmly glued, but not let the glue overflow into the lens or sensor area. The “non-stick” feature of teflon dispensing needles comes into play here: the needles don't pick up glue threads when they leave after dispensing, avoiding component shifting caused by glue sticking to traditional needles. For example, in the installation of the heart rate sensor of a smartwatch, the needle is able to make three uniform glue dots on the edge of the 1 mm diameter sensor, each with a diameter of only 0.2 mm, which not only ensures that the sensor fits securely, but also does not affect the detection of light penetration.

The LED package: to the "light source" to add a "colour coat"

LED light-emitting colours and brightness of the beads, depends largely on the fluorescent adhesive dispensing precision. When dispensing fluorescent glue on the LED chip, small differences in the amount of glue may lead to deviations in the colour temperature of the lamp bead, affecting the lighting effect.