The germplasm resource bank of crops can actually be regarded as a "gene" bank of crop germplasm resources. After the mobile phones of different crop germplasm resources have been reorganized, they can enter the crop germplasm resources pool for long-term storage, and follow-up crops. When breed breeding, only the “genes†of the necessary crop germplasm resources need to be called in the crop germplasm resource bank, and these excellent crop germplasm resources “genes†can be utilized to produce better quality and better yields. New crop varieties are truly committed to agricultural production.
LED Packages
LED (semiconductor light-emitting diode) packaging refers to the packaging of light-emitting chips, which is quite different from integrated circuit packaging. The packaging of the LED is not only required to be able to protect the wick, but also to be able to transmit light. Therefore, LED packaging has special requirements for packaging materials.
Generally speaking, the function of the package is to provide sufficient protection for the chip to prevent long-term exposure or mechanical damage to the chip in the air to improve the stability of the chip; for the LED package, it also needs to have good light extraction efficiency and good heat dissipation. , A good package can make the LED have better luminous efficiency and heat dissipation environment, and then improve the life of the LED.
1. Expand the crystal, open the densely arranged chips a little bit to facilitate the crystal bonding. Led Packages,White Led Package,Useful Led Package,Custom Ceramic Substrate Bingri Electronic Technology (Shenzhen) Co., Ltd. , https://www.bingriuvled.com
In many areas of our country, there are crop resources suitable for growing in the local areas, and the use of the crop Germplasm Bank to create regional “gene†banks of crop germplasm resources can help the local agricultural sector fully take advantage of geographical resources. And utilization, expand the strategic reserve of crop germplasm resources, strengthen the accurate identification and in-depth excavation of germplasm resources, and provide a more powerful guarantee for the development of modern seed industry and the pollution-free vegetable market.
The improvement of crop varieties is inseparable from the protection of crop germplasm resources. This is because the germplasm resources of crops are contained in various crop varieties, strains, types, wild species, and related plants, and are the source of genes for improved crops. Moreover, with the development of society, the food, energy and environmental crisis that humanity will face in the future will all depend on the possession of germplasm resources. Therefore, at this stage, using the germplasm resources bank of crops to create a “gene†bank of crop germplasm resources, salvaging and protecting these excellent crop germplasm resources has become more and more important, and it has become a way to strengthen the innovation and utilization of germplasm and improve our species. The important technical force of the international competitiveness of the industry, and the application of crop germplasm resources in scientific research units, breeding units, enterprises, local and public users are becoming more and more widespread.
2. Die-bonding, point conductive/non-conductive glue on the bottom of the holder (conductivity depends on whether the chip is a top-bottom PN junction or a left-right PN junction) and then put the chip into the holder.
3. Short bake, so that the chip does not move when the glue cures the bonding wire.
4. Wire bonding, use gold wire to connect the chip and the support.
5. Pre-test, preliminary test whether it can be bright.
6. Fill the glue and wrap the chip and the bracket with glue.
7. Bake for a long time to allow the glue to solidify.
8. Post-test, test whether it can be bright or not and whether the electrical parameters meet the standard.
9. Light and color separation to separate products with roughly the same color and voltage.
10. Packaging.
The Germplasm Bank of Crops makes every effort to create a "gene" library of crop germplasm resources