A trait whose methods all need implicit parameter, what's the best design pattern

trait A{

  def m1(x:Int)(implicit b:Builder) = ???
  def m2(x:Char)(implicit b:Builder) = ???
  def m3(x:String)(implicit b:Builder) = ???
  def m4()(implicit b:Builder) = ???
}

I have a trait A like code above. All method in A need a implicit builder. I felt that implicit b:Builder is too redundent. I was thinking to use a attribute of builder like code below, however Builder is not supposed to be a memeber in class B:

class B extends A{
   implicit val b:Builder = ???

}

what's the suitable design pattern for this?