Why use quartz tank for semiconductor wet etch process?

In semiconductor wet etching process, experts suggest that you choose an etching system that uses quartz tank (or is made from quartz materials). And there are compelling reasons why this is so. Well, aside from it is made from the second most abundant mineral that can be found in the Earth's continental crust, some practical reasons why it is recommended (and why should you use quartz tank) are the following:

• Durability - considered to be harder than granite and most metals, it makes sense that quartz are durable and so anything that is made from quartz is considered durable as well. This is one of the reasons why quartz tank is popular in the industry.
• Non-reactivity to a variety of chemistries - quartz is also one of the materials that do not react to chemistries (e.g. it does not react with acid) and thus, the substrate that is processed inside it safe from contamination.
• High purity - quartz provides high purity standard so there is nothing to worry about  this problem. This is very important most especially when processing semiconductors wherein high purity is absolutely necessary.

Aside from quartz tanks, some quartz products that can be used in processing works are the following:

• Quartz boats - also known as substrate carriers; designed to accommodate wafers of 4", 6", 8", and 12" in diameter; they can come in various designs or sizes and manufacturers can also design according to your specifications.
• Quartz chambers - designed to accommodate plasmas that can reach extremely high temperatures but need high purity and visual verification; they are ideal because they are high resistant to heat.
• Quartz drains - are generally placed on the side or at the bottom part of quartz tanks.; they can be used to recirculate chemistry or for tank evacuation.
• Quartz aspirators - these are also known as filter pumps; the tool is used to produce a vacuum by means of the Venturi effect; this is used in high temperature applications.
• Quartz boat adapters - can reduce cost in wafer processing; can also help for increased production throughput.

Computer chassis anodizing - a practical way to protect your system units

Anodizing, an electrolytic passivation process, is aimed at increasing the thickness of the natural oxide layer on the surface of metal parts. This process is also being applied to computer chassis (also known as computer casing) as this is a practical way to protect a system unit, particularly the components inside it.

Here are some practical benefits of anodizing computer chassis:

• Makes the computer casing sturdy and therefore can not be easily deformed when a force is exerted on it; provides more strength to the casing and therefore can hold the components in their places.
• Makes the metal sheet more resistant to corrosion and therefore can prolong the system unit's life span; anodizing protects the metal sheet from air moisture and other external constraints that can potentially damage the components inside.
• Makes the metal sheet with less scars and more resistant to wearing, which is common during fabrication and surface dirt cleaning

Anodizing advantages over other metal sheet processes:

• The process is generally less expensive
• Anodizing, as opposed to other form of coating, cannot peel-off since the coating itself is part of the metal.
• Anodizing's translucent property gives a metal sheet a deeper, richer metallic appearance, which is not only aesthetically advantageous but opens the possibility of computerized color matching with quantitative, objective color data.
• Anodizing is environment friendly; anodizing service providers, therefore, are indeed taking a bold step for environmental rehabilitation/protection campaign leading to a sustainable development.