Is there any examples of a Banach algebra which every ideal of it, is a maximal ideal?

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Is there any examples of a Banach algebra which every ideal of it, is maximal ideal?

Or, Is there any conditions which turn all of the ideals of a Banach algebra to maximal ideals?

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Consider the reals under multiplication and addition. Then the only proper ideal is $0$. Thus every proper ideal is maximal.