Etching
Etching
Etching (/ˈɛtʃɪŋ/) is a technique used in the manufacturing of printed circuit boards (PCBs), microelectronic devices, and in the preparation of specimens for microscopic examination in the medical field.
Etymology
The term "etching" originates from the Dutch word "etsen", which was derived from the Old High German word "azzen", meaning "to feed" or "to cause to eat". This refers to the process of using acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (incised) in the metal.
Process
In the medical field, etching is used in the preparation of specimens for microscopic examination. The process involves the use of a strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (incised) in the metal. This technique is used to reveal the underlying structures of the specimen, allowing for detailed examination and study.
Related Terms
- Microscopy: The technical field of using microscopes to view objects and areas of objects that cannot be seen with the naked eye.
- Mordant: A substance used to set dyes on fabrics or tissue sections by forming a coordination complex with the dye which then attaches to the fabric or tissue.
- Intaglio: A design incised or engraved into a material.
- Acid: A chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red.
See Also
External links
- Medical encyclopedia article on Etching
- Wikipedia's article - Etching
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