How to introduce delay to a signal

I need to introduce a delay to the output of an astable, it needs to be in the order of 10 micro seconds.

I have read that optical cable is good for delays, which makes sense for small delays, but I have no access to optical cable for the project I am working on. The ideal solution would be some components / IC's. I am working with a square wave, so the signal can be assumed to be digital

Answer

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There is a tolerance on Vt+ and Vt- that shifts withtemperature that will make the delays asymmetric.

Also if the waveform is not repetitive, it will take 20% longer for the 1st edge.

This is my approach if the delay tolerance is adequate.

Since the Schmitt trigger thresholds are 1/3 to 2/3 each delay is 2/3 of V+ which is very close to linear approximation of the RC exponential decay.