1. 另外 ，采用无量纲的形式给出了焊点高度与共晶焊料量、焊盘尺寸、芯片凸点的尺寸，芯片重量之间的关系模型，研究结果对倒装焊焊点形态的控制、工艺参数的优化和提高焊点可靠性具有指导意义。1 引言半导体集成技术和微细加工技术的迅速发展，推动了电子器件的封装技术向高密度、高可靠性方向发展。
When the volume of eutectic solder was smaller than V critical, the stand off height of solder joint was equal to the radius of solder bump on chip; when the volume is greater than V critical, the stand off height was greater than the radius of solder bump and increased with the increase of eutectic solder volume, Besides, the regression model was presented for stand off height of solder joints vs. eutectic solder volume, substrate pad size, solder bump size and chip weight in dimensionless form.
Well said, we all shared in, in order to survive, the development of hope.
Companies adhere to the people of this principle, one customer, the company's survival and development are the fundamental, the company's products, technologies, services always adhere to the customer as the center; the other company's employees is the foundation for the company, concerned about the staff and employees to establish solidarity Relations, and jointly create and establish a good working systems, processes and technical standards by the mine operational, adhere to the high-tech products, growing company overall strength, so that it will become for both domestic and international markets, Ability to participate in international competition in the technology-oriented enterprises.
The research method is that, impersonally introduce history and analysis films combining with the actual development of Guangxi film, roughly from the angle of film themes, adopting synchronic and diachronic methods, and mainly focusing on micro-level.
After research, however, this thesis points out that during the history of the development of the theory of American property law, atomism and organicism, individualism and republicanism, individual advantage and social benefit could coexist in each era.
In the new century of knowledge economics, there is a close relationship between the quality level of publications in the publishing industry and the continuo its development of a nation's civilization.
China will forge ahead and share weal and woe with other Asian countries in a joint effort to open up new vistas for Asia's development.
China-Africa relations have withstood the test of international vicissitudes and maintained the momentum of robust growth.
The former mainly adopts the diachronic and synchronic combined method, to show each concrete animal words development evolution, and then reflect the richness and diversity of animal words in the Tai Ping Guang Ji.
Beijing and Tianjin have been helpt each other for a long time and this area is the most active district of economic development in the north of china.
There are 32 articles in 《 XunZi 》, involving the basic problems of linguistics. Thy are the origins of Chinese characters, social essence of language, inherit and develop of language, function of language, modifier of language, dialect and common language etc.
Try Talking About the Certainty of Yu Qian's Honor or Disgrace Different religious cultures have been sharing honor or disgrace while multi-coexisting in Beijing.
Justice is a dialectical unity of abstract and concrete, subjective and objective, relative and absolute, universal and particular, changed and unchanged, diachronic and synchronic.
This is our valuable asset, the ability to create an enabling environment for development through collective strengths.
Throughout the long history, human communities havenever been so closely interconnected in interests and destinies.
As a human in the nature is a long-term development of Nature as the elements of forest park.
The contemporary China's social development is prompted in the way of reform and openness.
Inherent technology, instinctive technology, natural technology and social technology are the four basic forms of technology which are different and associational, showing the relations of discontinuity to continuity, of development in time to mutual effect in space.
Catic Decoration well understands that business improvement depends on and is in relationship with improvement in management and technique.
Shopping center more than two decades of fighting, Ryuji text from a farmer to become an entrepreneur, but he think that this is the partys reform and opening-up policy to the career development opportunities, he should have a strong sense of social responsibility, economic development for the revitalization of our nation to do a desire to contribute, he is fully aware that the success of an entrepreneur and national economic development is closely related and share weal and woe.