Infini RF - scars did not respond - is it the treatment parameters? (Photo)

Your skin looks better to me but you still have active acne that needs treatment.  I suggest a combination approach of microneedling RF combined with erbium or microneedling/PRP.  you will need more than 2 treatments to get improvements and will need at least 2-3 times a year as maintenance forever.  Best, Dr. Emer.

The settings you mentioned are more superficial than I use for acne. To get the best results, multiple passes at 2.5 to 3mm are generally indicated. 4 treatments will sometimes be necessary. Acne is always difficult to treat and other modalities may be necessary to enhance the overall results.

The settings that you reported are not generally adequate for treating acne scars.  To reduce acne scarring, the needle depths typically recommended are deeper than those used for your treatment, up to 2.5mm-3mm, for example.  The pulse width (the duration of time, in milliseconds, that the radiofrequency energy is delivered to your skin), is also shorter than typically used to treat acne scars in my experience.  In my practice, we use longer pulse widths, 120ms-180ms, and lower energies, level 3-4, when targeting acne scars.  We see significant improvement using these parameters to treat acne scarring.  You may benefit from a second opinion from a Board Certified dermatologist experienced in RF microneedling.