    <SEC-DOCUMENT>0001039399-22-000070-index.html : 20220726
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    <ACCEPTANCE-DATETIME>20220725204100
    ACCESSION NUMBER:		0001039399-22-000070
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		25
    CONFORMED PERIOD OF REPORT:	20220719
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    FILED AS OF DATE:		20220726
    DATE AS OF CHANGE:		20220725

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			FORMFACTOR INC
    		CENTRAL INDEX KEY:			0001039399
    		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
    		IRS NUMBER:				133711155
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-50307
    		FILM NUMBER:		221104674

    	BUSINESS ADDRESS:
    		STREET 1:		7005 SOUTHFRONT ROAD
    		CITY:			LIVERMORE
    		STATE:			CA
    		ZIP:			94551
    		BUSINESS PHONE:		9252904000

    	MAIL ADDRESS:
    		STREET 1:		7005 SOUTHFRONT ROAD
    		CITY:			LIVERMORE
    		STATE:			CA
    		ZIP:			94551
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>form-20220719.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: form-20220719.htm

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    <DOCUMENT>
    <TYPE>EX-10.01
    <SEQUENCE>2
    <FILENAME>exhibit10.htm
    <DESCRIPTION>EX-10.01
    <TEXT>
    Document 2 - file: exhibit10.htm

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    <DOCUMENT>
    <TYPE>EX-10.02
    <SEQUENCE>3
    <FILENAME>exhibit102_executivechange.htm
    <DESCRIPTION>EX-10.02
    <TEXT>
    Document 3 - file: exhibit102_executivechange.htm

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    <DOCUMENT>
    <TYPE>EX-10.03
    <SEQUENCE>4
    <FILENAME>exhibit103_ceochangeofcont.htm
    <DESCRIPTION>EX-10.03
    <TEXT>
    Document 4 - file: exhibit103_ceochangeofcont.htm

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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>5
    <FILENAME>form-20220719.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
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    <SEQUENCE>6
    <FILENAME>form-20220719_lab.xml
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    <TEXT>
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    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>form-20220719_pre.xml
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    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>exhibit10001.jpg
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>exhibit10002.jpg
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>exhibit10003.jpg
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>exhibit10004.jpg
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>exhibit10005.jpg
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>exhibit10006.jpg
    <TEXT>
    Document 13 - file: exhibit10006.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>exhibit10007.jpg
    <TEXT>
    Document 14 - file: exhibit10007.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>exhibit10008.jpg
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>exhibit10009.jpg
    <TEXT>
    Document 16 - file: exhibit10009.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>exhibit10010.jpg
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>18
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>19
    <FILENAME>form-20220719_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    Document 19 - RAW XML: form-20220719_htm.xml

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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>20
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: Financial_Report.xlsx

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>Show.js
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    <TEXT>
    Document 21 - file: Show.js

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>22
    <FILENAME>report.css
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    <TEXT>
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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>23
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: FilingSummary.html

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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>25
    <FILENAME>MetaLinks.json
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    <TEXT>
    Document 25 - file: MetaLinks.json

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    <TYPE>ZIP
    <SEQUENCE>26
    <FILENAME>0001039399-22-000070-xbrl.zip
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