Zend zf2 validacion exprecion regular

[zerokull]

Hola buenas tardes. Espero me puedan ayudar.

Estoy tratando de validar una exprecion regular ( validacion de RFC México) con Zend Framework 2, en la parte de los formularios. Este es mi codigo:

Código PHP:

  $inputFilter->add(
                    $factory->createInput(array(
                            'name' => 'rfc',
                            'required' => true,
                            'filters' => array(
                                    array('name' => 'StripTags'),
                                    array('name' => 'StringTrim')
                            ),
                            'validators' => array(
                                    array(
                                            'name' => 'NotEmpty',
                                            'options' => array(
                                                    'messages' => array(
                                                            $isEmpty => 'RFC no puede estar vacio.'
                                                    ),
                                                    'encoding' => 'UTF-8',
                                                    'min' => 5,
                                                    'max' => 15
                                            ),
                                            'break_chain_on_failure' => true,                                            
                                    ),
                                    array(
                                            'name' => 'Regex',
                                            'options' => array(
                                                    'pattern' => '/^([A-Z,Ñ,&]{3,4}([0-9]{2})(0[1-9]|1[0-2])(0[1-9]|1[0-9]|2[0-9]|3[0-1])[A-Z|\d]{3})$',
                                                    'messages' => array(
                                                            $regex => 'RFC con formato invalido'
                                                    ),
                                            ),
                                    ),
                            )
                    ))); 
   

y al momento de probarlo me marca este error: Internal error parsing the pattern '/^([A-Z,�,&]{3,4}([0-9]{2})(0[1-9]|1[0-2])(0[1-9]|1[0-9]|2[0-9]|3[0-1])[A-Z|\d]{3})$'

yo digo que es por la Ñ.
alguien me puede dar una mano?

Gracias y saludos