Acknowledged as one of the most demanding processes in the industry, Silicon Nitride etching requires a thorough knowledge on the chemistry involved as well as the specific requirements. Therefore, learning to understand the principles behind this approach is helpful particularly to those who are in the semiconductor industry.
So, how it is carried out? The process includes the following:
* Needed materials are prepared for the exposure to appropriate temperatures - the objective is to achieve the greatest etch and the best selectivity. This goal is made possible through the use of phosphoric acid on its highest ratio of water at a given temperature.
* Integration/ installation of water addition system - a way to keep ideal amount of water in the wet process system.
* The use of closed system (e.g. Imtec's Nitride Etch Accubaths) for precised control of temperature as well as the acid concentrations
*The application of closed refluxing system, combined with a system's control algorithm, helps assure that uniformed conditions are created throughout the bath - the key to achieve a precisely controlled etch rate and the best possible selectivity.
* To help ensure that the liquid and fume do not cross the boundary of the heater area, a particular component that acts as a barrier between the harsh environment and the sealant is used - like the Aquaseal from Accubath. This technique helps eliminate the most common failure mode seen on heated wet process tanks.
Silicon Nitride Etching - The industry benefits
The manufacture of Silicon Nitride films gives a number of benefits specifically to the semiconductor industry as it contributes to various important applications, such as the following:
* for the production of integrated circuits - a very important component that is used in most, if not all, of electronic devices found in the market these days.
* utilized as masking layers for local oxidation of silicon.
* used as electrical insulators which have a comparatively high dielectric constant
In addition to helping the semiconductor industry, Silicon Nitride etching play a significant role in other industries as well such as in automobile where it is applied to engine parts; bearings (e.g. ceramic bearings, which have a good resistance to shocks; and medical industry as it is used in many medical applications such as an alternative to titanium.
So, how it is carried out? The process includes the following:
* Needed materials are prepared for the exposure to appropriate temperatures - the objective is to achieve the greatest etch and the best selectivity. This goal is made possible through the use of phosphoric acid on its highest ratio of water at a given temperature.
* Integration/ installation of water addition system - a way to keep ideal amount of water in the wet process system.
* The use of closed system (e.g. Imtec's Nitride Etch Accubaths) for precised control of temperature as well as the acid concentrations
*The application of closed refluxing system, combined with a system's control algorithm, helps assure that uniformed conditions are created throughout the bath - the key to achieve a precisely controlled etch rate and the best possible selectivity.
* To help ensure that the liquid and fume do not cross the boundary of the heater area, a particular component that acts as a barrier between the harsh environment and the sealant is used - like the Aquaseal from Accubath. This technique helps eliminate the most common failure mode seen on heated wet process tanks.
Silicon Nitride Etching - The industry benefits
The manufacture of Silicon Nitride films gives a number of benefits specifically to the semiconductor industry as it contributes to various important applications, such as the following:
* for the production of integrated circuits - a very important component that is used in most, if not all, of electronic devices found in the market these days.
* utilized as masking layers for local oxidation of silicon.
* used as electrical insulators which have a comparatively high dielectric constant
In addition to helping the semiconductor industry, Silicon Nitride etching play a significant role in other industries as well such as in automobile where it is applied to engine parts; bearings (e.g. ceramic bearings, which have a good resistance to shocks; and medical industry as it is used in many medical applications such as an alternative to titanium.
About the Author:
Paul Drake has had long years working in a high tech company before venturing on the Internet as a freelance writer. He uses his prior experience to write a wide array of topics including wet process and Silicon Nitride Etching. He also manages his own blog, which reflects his on the Internet current works.
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