EXHIBIT 5.1
                                                                     -----------



                                  June 28, 2001



Genus,  Inc.
1139  Karlstad  Drive
Sunnyvale,  CA  94086

          RE:     REGISTRATION  STATEMENT  ON  FORM  S-8

Ladies  and  Gentlemen:

     We  have examined the Registration Statement on Form S-8 (the "Registration
Statement")  to  be  filed  by  Genus,  Inc.,  a  California  corporation  (the
"Registrant"  or "you"), with the Securities and Exchange Commission on or about
June  28,  2001, in connection with the registration under the Securities Act of
1933,  as  amended, of shares of your Common Stock, no par value (the "Shares"),
reserved  for  issuance  pursuant  to  the 2000 Stock Plan and the 1989 Employee
Stock  Purchase  Plan,  as  amended  (the  "Plans").  As  your  legal counsel in
connection  with this transaction, we have reviewed the proceedings taken by you
in  connection  with  the issuance and sale of the Shares pursuant to the Plans.
It  is  our  opinion  that,  when issued and sold in the manner described in the
Plans  and pursuant to the agreements that accompany each grant under the Plans,
the  Shares  will  be legally and validly issued, fully-paid and non-assessable.
We  consent  to  the  use  of  this  opinion  as  an exhibit to the Registration
Statement,  and further consent to the use of our name wherever appearing in the
Registration  Statement  and  any  subsequent  amendment  thereto.

                                Very  truly  yours,

                                WILSON  SONSINI  GOODRICH  &  ROSATI
                                Professional  Corporation

                                /s/  Wilson  Sonsini  Goodrich  &  Rosati