Because the etched pattern will be effected by many factors, many technical difficulties such as getting the ideal etched pattern and monitoring the etching process have not been solved yet.

因影响半导体激光诱导液相腐蚀效果的因素很多，要得到理想的腐蚀图样以及监控腐蚀进程有着很大的技术难度，至今没有得到有效解决。

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Their etched pattern takes its design from the unique architectural details of the specific buildings in front of which they are placed.

BBC: NEWS | UK | England | Tyne/Wear | Best foot forward for public art

This is a regular geometric pattern etched onto the surface of the tungsten.

ECONOMIST: Solar power

In particular, the processes by which the circuit pattern is first projected on to a chip's surface lithographically, and then etched on to it chemically, will need to be altered to take account of the fact that the surface is curved.

ECONOMIST: Semiconductors