Not correct. The location of the chip depends on the country. The ICAO standard for e-ppts is non-specific as to chip location. US chips are indeed in the back cover. Australia places them in the centre of the book, between two visa pages. UK chips are laminated behind the biographic datapage.

But why would you want to disable the chip? Is it a protest against big government? Think twice before you do. As you mentioned, e-ppts have a logo on the front cover. (Some countries repeat this logo on the datapage.) If an e-ppt is read at a border and a chip is not detected, this will immediately raise a flag and will likely earn you a trip to seconday inspection as tampering will be suspected, e.g. possibly an imposter travelling on a stolen and/or tampered document. The way FTers schedule tight connections, even when crossing borders, I would not risk the long delay that secondary inspection would entail.
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13F