It is rare to borrow from the major mode during a passage in a minor key. The major tonic usually functions as $\left.\text{V}\middle/\text{iv}\right.$ if it's not the last chord of a piece, and raised $\hat{6}$ and $\hat{7}$ occur naturally as part of the melodic minor scale.
In minor, the one place to borrow from the major mode is at the end of a piece in minor, with the use of the major $\left.\text{I}\right.$ chord instead of minor $\left.\text{i}\right.$.