首页>
外国专利>
Dielectric material having a low temperature coefficient and with high unloaded quality, a method for the production and individual / multilayer printed circuit board with this material
Dielectric material having a low temperature coefficient and with high unloaded quality, a method for the production and individual / multilayer printed circuit board with this material
展开▼
机译:具有低温度系数和高卸载质量的介电材料,制造该方法的方法以及使用该材料的单层/多层印刷电路板
展开▼
页面导航
摘要
著录项
相似文献
摘要
A dielectric material is disclosed which has a small absolute value of the temperature coefficient of resonance frequency and a high coefficient of unloaded quality. Also disclosed are a process for producing the dielectric material and multilayer and other circuit boards containing the dielectric material. The dielectric material is a highly densified material having a water absorption lower than 0.1%, which is obtained by mixing 95.5 to 99.5 percent by weight mixture of a glass frit and a strontium compound with 0.5 to 4.5 percent by weight titanium dioxide, compacting the resultant mixture, and sintering the compact at a relatively low temperature around 930°C. This dielectric material is a glass ceramic containing strontium anorthite (SrAl2Si2O8) as the main crystalline phase, and may contain the TiO2, which remains unchanged after sintering. The absolute value of the temperature coefficient of resonance frequency of the dielectric material is 20 ppm/°C or lower, preferably 10 ppm/°C or lower, more preferably 5 ppm/°C or lower. The product of the unloaded quality coefficient and resonance frequency is 1,800 GHz or larger, preferably 2,500 GHz or larger. This material therefore has excellent dielectric properties.
展开▼