Another question about composite types

Hi, I need to create a table like:

CREATE TYPE t_salary AS (

Value numeric(10,2),

Validity date

);

CREATE TABLE employee (

id int,

name varchar(30),

salary t_salary[]

);

That is, I need an array of composite type and searching on google I found
that is impossible to do it! Is it really impossible? Anyone have do it ?

Thanks!