etchant การใช้

• It is an anisotropic etchant of silicon, exposing octahedral planes.
• It finds increasing use as an etchant in microelectronics.
• To overcome this problem an anisotropic etchant is used.
• The resist protects the non-image areas of the cylinder from the etchant.
• The first is over etching, which means the etchant was applied too long.
• The long shelf life of this etchant allows the solution to be stored in large quantities.
• Trimethylsilane is used in the semi-conductor industry as an etchant in the plasma phase.
• This etchant is used by metallographers to provide contrast between binder and carbide phases in cemented carbides.
• The resulting brown, acidic, and etchant for copper-based metals in printed circuit boards.
• The second is due to an isotropic etchant, which means the etchant etches in all directions equally.
• The second is due to an isotropic etchant, which means the etchant etches in all directions equally.
• The etchant would bite into the unprotected areas, causing the painted areas to be raised into relief.
• In bubble etching, air is passed through the etchant bath to agitate the solution and speed up etching.
• In spray etching, the etchant solution is distributed over the boards by nozzles, and recirculated by pumps.
• A test piece may be made with etching times noted, as the strength of the etchant will vary.
• The wafer can be immersed in a bath of etchant, which must be agitated to achieve good process control.
• In these publications, by comparison, the Wright etch was the preferred etchant to reveal defects in silicon crystals.
• On high reliability boards a process called etch-back is performed chemically with a potassium permanganate based etchant or plasma.
• Small-scale etching requires attention to disposal of used etchant, which is corrosive and toxic due to its metal content.
• A new grade of ceric ammonium nitrate was introduced with tighter metals tolerances for use as an electronics-grade etchant component.