Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Production method for aluminum nitride ceramic substrate for LED
The invention discloses a production method for an aluminum nitride ceramic substrate for an LED. The production method is characterized by comprising the following steps that firstly, burdening is conducted, high-purity directly-nitrided aluminum nitride powder or self-propagating aluminum nitride powder and three-component compound sintering aids are mixed; secondly, ball grinding is conducted, ethyl alcohol/methylbenzene or ethyl alcohol/butanone and glycerin or castor oil are added for ball grinding for 24-25 hours at the rotating speed of 482 rad/s, and polyvinyl butyral and polyethylene glycol are added for ball grinding for 26-27.5 hours at the rotating speed of 505 rad/s; thirdly, vacuum defoaming is conducted, and defoaming is conducted in the negative-pressure environment of 9.5*104-9.4*105 Pa; fourthly, tap casting is conducted; the height of a scraper is controlled to be 2.4-2.7 mm, and the casting tape speed is 0.1-0.3 m/minute; fifthly; rubber removing is conducted, and rubber removing is conducted in a continuous type rubber removing furnace continuously for 2-3 h at the temperature of 450-580 DEG C; sixthly, sintering is conducted, and sintering is conducted in a muffle furnace under the protection of the mixed atmosphere of hydrogen and nitrogen at the temperature of 1550-1680 DEG C. The aluminum nitride ceramic substrate for the LED has good heat conductivity, the reliable electric insulating property, the low dielectric constant and the low dielectric loss.
Production method for aluminum nitride ceramic substrate for LED
The invention discloses a production method for an aluminum nitride ceramic substrate for an LED. The production method is characterized by comprising the following steps that firstly, burdening is conducted, high-purity directly-nitrided aluminum nitride powder or self-propagating aluminum nitride powder and three-component compound sintering aids are mixed; secondly, ball grinding is conducted, ethyl alcohol/methylbenzene or ethyl alcohol/butanone and glycerin or castor oil are added for ball grinding for 24-25 hours at the rotating speed of 482 rad/s, and polyvinyl butyral and polyethylene glycol are added for ball grinding for 26-27.5 hours at the rotating speed of 505 rad/s; thirdly, vacuum defoaming is conducted, and defoaming is conducted in the negative-pressure environment of 9.5*104-9.4*105 Pa; fourthly, tap casting is conducted; the height of a scraper is controlled to be 2.4-2.7 mm, and the casting tape speed is 0.1-0.3 m/minute; fifthly; rubber removing is conducted, and rubber removing is conducted in a continuous type rubber removing furnace continuously for 2-3 h at the temperature of 450-580 DEG C; sixthly, sintering is conducted, and sintering is conducted in a muffle furnace under the protection of the mixed atmosphere of hydrogen and nitrogen at the temperature of 1550-1680 DEG C. The aluminum nitride ceramic substrate for the LED has good heat conductivity, the reliable electric insulating property, the low dielectric constant and the low dielectric loss.
Production method for aluminum nitride ceramic substrate for LED
FAN HONGMEI (Autor:in)
21.10.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
Production process of aluminum nitride aluminum-coated ceramic substrate
| Europäisches Patentamt | 2024
Production process of ultrathin aluminum nitride ceramic substrate
| Europäisches Patentamt | 2021
Aluminum nitride ceramic substrate surface treatment method
| Europäisches Patentamt | 2020
NITRIDE CERAMIC SUBSTRATE PRODUCTION METHOD AND NITRIDE CERAMIC BASE MATERIAL
| Europäisches Patentamt | 2020