Exhibit 21.1

SUBSIDIARIES OF CERADYNE, INC.

	State or other Jurisdiction of
Name of Subsidiary	Incorporation or Organization
Ceradyne ESK, LLC	Delaware
•   ESK Ceramics Geschäftsführungs GmbH	Germany
•   ESK Ceramics GmbH and Co. KG	Germany
•   ESK Ceramics France S.A.S.U.	France
Ceradyne Canadian Holdings, Inc.	Delaware
•   Ceradyne Canada ULC	Alberta, Canada
Ceradyne Armor Systems, Inc	Delaware
Minco, Inc.	Tennessee
Ceradyne Cayman Holdings, Inc.	Cayman Islands
•   Ceradyne Hong Kong Co., Ltd.	Hong Kong
•   Ceradyne (Tianjin) Technical Ceramics Co., Ltd.	China
Ceradyne EPB, Inc.	Delaware
•   Boron Products, LLC	Delaware
SemEquip, Inc.	Delaware