Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0000354204-12-000908
Filing Date
2012-02-14
Accepted
2012-02-13 18:58:38
Documents
1

Document Format Files

Seq Description Document Type Size
1 SCHEDULE 13G/A rrd164.htm SC 13G/A 50133
  Complete submission text file 0000354204-12-000908.txt   51883
Mailing Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746
Business Address 6300 BEE CAVE ROAD BUILDING ONE AUSTIN TX 78746 (512) 306-7400
DIMENSIONAL FUND ADVISORS LP (Filed by) CIK: 0000354204 (see all company filings)

EIN.: 222370029 | State of Incorp.: DE | Fiscal Year End: 1231
Type: SC 13G/A
SIC: 0000

Mailing Address 131 SOUTH CLARK DRIVE TEMPE AZ 85281
Business Address 131 S CLARK DR TEMPE AZ 85281 6029675146
AMTECH SYSTEMS INC (Subject) CIK: 0000720500 (see all company filings)

EIN.: 860411215 | State of Incorp.: AZ | Fiscal Year End: 0930
Type: SC 13G/A | Act: 34 | File No.: 005-39482 | Film No.: 12601278
SIC: 3559 Special Industry Machinery, NEC