combining strings to make a query

I'm using Erlang and postgresql to build a web interface.  When I
create the query string I get something like:

select * from table where field::text ilike '%\\\\%'

But when I do that (if someone types in '\' for part of the text
search), I get a pg log entry to use E'\\'

How would I use E'' with ilike '%%'.  ilike E'%\\%' doesn't work.

Thanks,

-wes