Patent ID: 7749289

Claim:
A reformer of a fuel cell system comprising: a plurality of reaction sections comprising a plurality of reaction plates, each of the reaction plates having a first surface and at least one second surface defining a serpentine channel in the first surface, the serpentine channel extending in directions substantially parallel to the first surface; at least one cover plate adjacent one reaction plate of the reaction plates; at least one first bonding joint contacting two adjacent reaction plates of the reaction plates and coupling the two adjacent reaction plates to each other; and at least one second bonding joint contacting the one reaction plate of the reaction plates and the at least one cover plate and coupling the one reaction plate and the at least one cover plate to each other, wherein the first surfaces of the reaction plates face a common direction, wherein the at least one first bonding joint contacts the first surface of one of the two adjacent reaction plates, and wherein at least one bonding joint is a metal layer with a serpentine opening corresponding to the serpentine channel of at least one of the reaction plates contacting the at least one bonding joint.