Wet Etching Recipes

How to use the wet etch table:

When entering a new etch into the table make a row for every etchant used in the solution such that the information can be sorted by etchant. For example, the InP etch HCl:H3PO4(1:3) and H3PO4:HCl(3:1). Likewise, if etch is known to be selective to multiple materials the etch should have a row for each material. For example HCl:H3PO4(1:3) is selective to both InGaAs and InGaAsP.

This multiple entry method may seem laborious for the person entering a new etch, however the power of sorting by selective materials and chemicals in a table with all materials is great.

Example Wet Etching Table (Include All Materials)

Material	Etchant	Rate (nm/min)	Anisotropy	Selective to	Selectivity	Ref.	Notes	Confirmed by	Extra column
InP	HCl:H3PO4(1:3)	~1000	Highly	InGaAs	High	[| Lamponi (p.102)]	Example	Jon Doe	Example
InP	HCl:H3PO4(1:3)	~1000	Highly	InGaAsP	High	[Lamponi (p.102)]	Example	Jon Doe	Example
InP	H3PO4:HCl(3:1)	~1000	Highly	InGaAs	High	[Lamponi (p.102)]	Example	Jon Doe	Example
InP	H3PO4:HCl(3:1)	~1000	Highly	InGaAsP	High	[Lamponi (p.102)]	Example	Jon Doe	Example