Silver Carbonaceous Conductive Ink in Electronic Screen Printing Technology (I)

First, the rapid rise of electronic screen printing industry

Silver conductive inks are referred to as silver pastes or silver oils. Carbonaceous conductive inks are also referred to as carbon pastes or carbon oils. In the following, we will refer to them as silver conductive inks or carbon conductive inks. Silver conductive inks and carbon conductive inks are used more and more widely in the electronics industry, microelectronics industry, and electronic information industries. For example, there are screen printing carbon conductive inks or conductive polymers that are well-known to all of you. It is one of the manufacturing methods embedded in resistive multilayer printed circuit boards (MLBs); embedded MLB is one of the important topics in the 21st century's advanced mounting technology; for example, there is carbon in our PCB industry. Quality single, double-sided printed circuit board; silver or carbon conductive ink through-hole printed circuit board; laminated board manufacturing technology silver conductive adhesive (paste) screen printing and so on. Of course, there are some areas in which the PCB industry has been exposed to alienation, such as:

1, heating element

In Japan, a neighboring country, there is a product called surface heating element, which is a new type of heating material made mainly by carbon-based materials screen printing, its use can be used as winter housing (offices, residential, sports, cultural venues Such as the warmth of the cold, because this heat material called PTC has a far-infrared function, it has an excellent role in promoting the health of people; this material can also be used to deicing the garage and the road Snow; can also be used for indoor cultivation of agriculture, medical treatment, hygiene, clothing, screen printing hot plate, and so on. The greatest advantage of this carbon-based heat-generating material is that it consumes a small amount of electrodes, is inexpensive and very safe, and its maximum temperature (without a thermostat) is only 80°C, so there is absolutely no fire.

2. Required materials for manufacturing SMD components

(1) In the manufacture of multi-stack monolithic capacitors (MLCs), the conductive material of the inner electrode contains silver (Ag), silver palladium (Pd), gold (Au), and platinum (Pt). among them

Silver (Ag) electrode resistivity <0.005 Ω/s

The resistivity of the silver/palladium (AQ/Pd) electrode is < 0.04 Ω/μm

(2) In the ceramic thick film multi-layered substrate LCCC (leadless ceramic chip carrier) microelectronics assembly technology, component wire bonding regions and component surface regions are screen printed with silver/palladium (Ag/Pd) conductive printing material.

3. Application of silver conductive ink in thick film IC

(1) Use a silver conductive ink with a very low resistivity to make a thick film IC conductive material;

(2) A resistive film is formed on the substrate, and the used resist ink is mainly silver, gold, palladium, rhodium, and other metal powders;

(3) Electrode ink for small capacitors is mainly composed of silver, platinum/gold, palladium/gold, etc.

4, the production of solar cells

1 Screen printed carbon conductive ink was used as an electrode on a CdTe (cadmium telluride) film in a solar cell.

2 A silver (Ag) + In (indium) electrode printed on the CdS (Cadmium sulfide) side can take out the electrical energy generated by the PN junction and serve as a negative electrode that is transported to the outside.

3 The word compensation electrode printed on the front with silver conductive ink is used to compensate for the loss of the carbon (C) electrode resistance.

5, carbon conductive ink has a wide range of applications in the computer keyboard circuit

6, in the membrane switch technology, silver conductive ink and carbon conductive ink and silver carbon mixed conductive ink application is commonplace, there is also used for solar cell and substrate connection, substrate and substrate connection; in liquid crystal display (LCD) technology Medium-temperature, transparent conductive glass and substrate, and a heat-flexible connector for connection between the LCD and the PCB.

The widespread application of silver and carbon conductive inks in high-tech fields and electronic basic industrial products has led to the rapid emergence of a new cross-industry industry, which is the electronic screen printing industry that we call the sunrise industry.

The emerging electronic screen printing industry has the following features:

● Cross-industry of products and talents

In this industry, the elites of the screen printing industry, PCB industry, microelectronics industry, and information industry are gathered. The engineers and technicians working in this industry should be knowledgeable, versatile and comprehensive high-quality talents. This is a variety of Industry, a multidisciplinary and interdisciplinary emerging industry in which multiple technologies are integrated, infiltrated, and combined.

● product's high-tech properties

There are screen printing products with independent high-tech attributes, screen printing technologies for high-tech products, or screen printing products in new high-tech products. An important component.

● Attributes of high return on investment.