Document:

EX-10.5

 Exhibit 10.5 

[XXX] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10). Such excluded information is not material and
would likely cause competitive harm to the registrant if publicly disclosed. 
 WAFER FOUNDRY AGREEMENT 

This Wafer Foundry Agreement (“Agreement”) is made and entered into this 12th day of April 2013, (the “Effective Date”) by and
between Allegro MicroSystems, LLC, a limited liability company duly organized and existing under the laws of the State of Delaware, (“Allegro”), and Polar Semiconductor, LLC, a limited liability company duly organized and existing
under the laws of the State of Delaware (“PSL”). PSL and Allegro are sometimes referred to herein individually as a “Party” and collectively as the “Parties”. 

Witnesseth: 
 WHEREAS, Allegro
wishes to purchase certain semiconductor wafers; and 
 WHEREAS, PSL wishes to manufacture and sell such semiconductor wafers to Allegro; and 

WHEREAS, the Parties wish to set forth their respective rights and obligations with respect to the purchase and sale of such semiconductor wafers; and

 WHEREAS, Allegro desires PSL to use certain technology and intellectual property rights owned or otherwise controlled by Allegro for the purpose
of manufacturing semiconductor wafers in accordance with this Agreement, and in furtherance thereof, Allegro desires to grant to PSL a non-exclusive license to use such technology and intellectual property
rights for such purpose in accordance with this Agreement. 
 NOW, THEREFORE, in consideration of the mutual promises made herein, the Parties hereto
agree as follows: 
 Definitions: 
 As
used in this Agreement, the following terms will have the following respective meanings: 
  

	A)	 “Wafers” means the semiconductor Wafers for Device Types, fabricated by PSL using the process
technologies listed in Appendix A. Wafers will include Engineering Wafers, Production Wafers, and Process Qualification Wafers, as defined below. 

  

	B)	 “Device Type” will mean any of the various Allegro integrated circuit devices specified by
Allegro. 

  

	C)	 “Process Qualification Wafers” or “PQW” means Wafers manufactured for the
purposes of qualifying a new or changed Wafer manufacturing process, in accordance with Section 2.1 of this Agreement. 

  

	D)	 “Engineering Wafers” will mean any Wafers manufactured with unverified masks or requiring
process splits for product characterization based on qualified processes, as described in Section 2.2 of this Agreement. 

  

	E)	 “Days. day or days” will mean calendar days unless stated otherwise. 

	F)	 “Production Wafers” will mean those Wafers manufactured at PSL after successful Mass
Production Wafer Approval, as referenced in Appendix B. 

  

	G)	 “Allegro Wafer Manufacturing Technology” or “Allegro WMT” means, from time to
time during the term of this Agreement, those certain processes and related technical information, whether or not patentable, then owned or controlled by Allegro, necessary for manufacturing Wafers, and listed in Appendix K attached hereto, as such
Appendix may from time to time, during the term of this Agreement, be amended by Allegro in its sole and absolute discretion in order for PSL to fulfill its obligations hereunder. In no event shall Allegro WMT be deemed to include any process or
technical information previously known by PSL prior to its receipt from Allegro, received from another party, becomes part of the public domain, or is independently developed by PSL. 

 

	H)	 “Allegro WMT Documentation” means, from time to time during the term of this Agreement, all
documents and other manifestations, in any form whatsoever (including, without limitation, Allegro WMT Production Records, operating procedures, masks, reticles, and the like) that describe, memorialize or otherwise make manifest the processes or
other inventions comprising the Allegro WMT and the use thereof by PSL. 

  

	I)	 “Allegro WMT Production Records” means all production records, data, analyses, and the like
generated by PSL in the course of manufacturing Wafers. 

  

	J)	 “Allegro Intellectual Property Rights” means, from time to time during the term of this
Agreement, all right, title and interest in, to and under the Allegro WMT then owned or otherwise controlled by Allegro. 

  

	K)	 “PSL Bloomington Wafer Fab Facility” means that certain facility owned by PSL and located at
2800 East Old Shakopee Road, Bloomington, Minnesota. 

  

	L)	 “PSL Wafer Manufacturing Technology” or “PSL WMT” means, from time to time
during the term of this Agreement, those certain processes and related technical information, whether or not patentable, then owned or controlled by PSL, used by PSL in manufacturing Wafers, and listed in Appendix K, attached hereto, as such
Appendix shall from time-to-time during the term of this Agreement be amended in order to reflect the manufacturing processes or other inventions then being used by PSL
to fulfill its obligations under this Agreement. It is further understood and agreed to by the Parties that technical information, documentation and intellectual property rights related to PSL’s [XXX] process shall not be included within PSL
WMT or PSL Intellectual Property Rights. 

  

	M)	 “PSL WMT Documentation” means, from time to time during the term of this Agreement, all
documents and other manifestations, in any form whatsoever (including, without limitation, operating procedures, masks, reticles, and the like) that describe, memorialize or otherwise make manifest the processes or other inventions comprising the
PSL WMT and the use thereof by PSL. 

  

	N)	 “PSL Intellectual Property Rights” means, from time to time during the term of this Agreement,
all right, title and interest in, to and under the PSL Wafer Manufacturing Patents and the PSL WMT then owned or otherwise controlled by PSL. It is further understood and agreed to by the Parties that technical information, documentation and
intellectual property rights related to PSL’s [XXX] process shall not be included within PSL WMT or PSL Intellectual Property Rights. 

	O)	 “written” or “writing” includes email or other electronic documents.

 Section 1.     Scope and Grant of License: 

 

	1.1	 Subject to the terms of this Agreement, PSL will fabricate certain Wafers ordered by Allegro, and PSLL will
deliver and sell such Wafers to Allegro. 

  

	1.2	 This Agreement does not constitute a purchase order or release for such services. PSL will not undertake any
expenses or other acts on Allegro’s behalf before receiving and agreeing to an actual purchase order or other written authorization from Allegro. 

  

	1.3	 Subject to the terms and conditions set forth in this Agreement, Allegro grants to PSL, and PSL accepts, a non-exclusive, royalty-free license under the Allegro Intellectual Property Rights, limited in accordance with the terms and conditions of this Agreement, to use the manufacturing processes and other inventions
comprising the Allegro WMT and the Allegro WMT Documentation in order to make the Wafers in compliance with PSL’s obligations under this Agreement or such other uses as the Parties may agree to in writing. Such license shall be limited to the
manufacture of Wafers by PSL in the PSL Bloomington Wafer Fab Facility (or such other facility operated or subcontracted by PSL and to which Allegro agrees in writing in its sole and absolute discretion), shall not be sublicensed or otherwise
transferred by PSL to any third party, and shall be subject to revocation, in whole or in part, by Allegro at any time in Allegro’s sole and absolute discretion, and in the event of such revocation, PSL shall cease any further use of such
portion or all, as specified by Allegro, of such manufacturing processes, other inventions and Allegro WMT. 

  

	 	1.3.1	 The license granted by Allegro to PSL, under this Section 1 of this Agreement, shall terminate upon the
expiration or termination of this Agreement. 

  

	 	1.3.2	 Upon the termination of the license granted by Allegro to PSL, in this Section 1 of this Agreement, PSL shall
promptly return to Allegro any and all Allegro WMT Documentation and, if requested in writing by Allegro, PSL shall certify that all Allegro WMT has been returned to Allegro. 

 

	 	1.3.3	 Allegro shall have the right, upon reasonable notice to PSL, during the term of this Agreement, during
reasonable times to inspect and copy the Allegro WMT Documentation. Documentation and information received by Allegro from PSL in this manner shall be used solely by Allegro to manufacture Wafers during a force majeure condition or if a default
event has occurred, unless otherwise agreed to in writing by PSL and Allegro. 

  

	 	1.3.4	 PSL agrees at all times during the term of this Agreement to maintain the Allegro WMT Production Records in a
secure manner at least as rigorous as it maintains its own information of a similar nature and consistent with PSL’s implementation of the requirements as set forth in the TS 16949 specifications. 

 

	 	1.3.5	 PSL agrees at all times during the term of this Agreement to maintain the PSL WMT Documentation in a secure
manner at least as rigorous as PSL’s most important documents and consistent with its implementation of the requirements as set forth in the TS 16949 specifications. 

 Section 2.     Wafer Fabrication: 

PSL will fabricate all Wafers at its Bloomington, Minnesota facility, using the process technologies stated in Appendix A. 

 

	2.1	 PSL will provide Allegro with PQW or qualification reports to establish wafer fabrication processes with the
following conditions: 

  

	 	2.1.1	 Wafer lot sizes will be as specified in Appendix D; 

 

	 	2.1.2	 Split Wafer lots for PQW will be mutually agreed upon by Allegro and PSL; 

 

	 	2.1.3	 PQW processed to standard conditions shall meet optical and mutually agreed upon electrical specification(s);

  

	 	2.1.4	 PQW not processed to standard conditions will meet optical and mutually agreed upon electrical
specification(s); 

  

	 	2.1.5	 Allegro acknowledges that the sale of all PQW not processed to standard conditions, but processed correctly
within practical limits according to the mutually agreed upon process flow, will be made “AS IS” and with all faults and without warranties, either express or implied, except as provided in Section 2.1.4; 

 

	 	2.1.6	 Future Wafer processes, including modifications to current Wafer processes, that are developed by PSL may be
added to this Agreement by mutual consent; 

  

	 	2.1.7	 PSL may subcontract various wafer processes at an outside subcontractor subject to Allegro’s prior written
consent; 

  

	 	2.1.8	 PSL will not transfer Allegro product from one fabrication facility to another regardless of the process or
technology being qualified at another fab without Allegro’s prior written consent; 

  

	 	2.1.9	 Subject to Allegro’s prior written consent, PSL may terminate the use of a Wafer process at the PSL Fab.
At least [XXX] prior to the date of the discontinuance of any process, PSL will provide Allegro with written notice of its intent to terminate such Wafer process and will cooperate with Allegro on a transition plan that allows Allegro to meet all of
Allegro’s contractual obligations with Allegro’s customers that provides Allegro’s customer with a maximum supply of [XXX] of inventory. PSL will also reimburse Allegro for all expenses incurred to redesign and requal affected devices
independent of whether the replacement design is manufactured at PSL. 

  

	2.2	 PSL will accept Allegro’s purchase orders for Engineering Wafers for Device Types, based on qualified
processes with the following conditions: 

  

	 	2.2.1	 Wafer lot sizes will be as specified in Appendix D; 

 

	 	2.2.2	 Split Wafer lots for Engineering Wafers will be mutually agreed upon by Allegro and PSL; 

	 	2.2.3	 Special instructions for Engineering Wafers will be documented in Allegro purchase orders;

  

	 	2.2.4	 Engineering Wafers processed to PSL’s standard process specifications will meet optical and mutually
agreed upon electrical specification(s); 

  

	 	2.2.5	 Engineering Wafers not processed to standard conditions will meet optical and mutually agreed upon electrical
specification(s); and 

  

	 	2.2.6	 Allegro acknowledges that the purchase of all Engineering Wafers that meet agreed upon Wafer Evaluation
Specifications, according to the mutually agreed upon process flow, will be made “AS IS” and with all faults and without warranties, either express or implied, except as provided in Section 2.2.5. 

 

	2.3	 PSL will accept purchase orders for Production Wafers with the following conditions: 

 

	 	2.3.1	 Wafer lot sizes will be as specified in Appendix D; and 

 

	 	2.3.2	 Both Parties have determined that the Device Type has been successfully approved for Mass Production Wafers, as
set forth in Appendix B. 

  

	2.4	 Upon acceptance, PSL will fabricate Production Wafers ordered by Allegro per the specifications referred to in
Appendix A. These specifications may be changed only upon mutual agreement in writing by both Parties. PSL will comply with all the requirements set forth in “Allegro’s Quality Plan”, as set forth in Appendix F. 

 

	2.5	 PSL will make available PSL’s wafer evaluation and electrical data for the wafer technologies, as set
forth in Appendix A, to Allegro through electronic means for each lot of Wafers delivered to Allegro prior to the shipment of the Wafers. PSL will also supply relevant reliability, optical and process control information, as set forth in Appendix E
and Appendix F upon Allegro’s request. 

  

	2.6	 PSL will follow Allegro’s change procedures as set forth in Appendix E and Appendix F with respect to
processes utilized to manufacture Allegro Wafers. 

  

	2.7	 For any lots not meeting the relevant criteria, as specified above, PSL will provide a Non-Conforming Material Permission (“NMP”) sheet electronically to the Director of Manufacturing Engineering, along with all applicable data, for Allegro’s review. If the material is determined by
Allegro to be acceptable, Allegro will complete the NMP and PSL will deliver the acceptable Wafers to Allegro. 

 Section 3.
    Forecast, Purchase Orders, Deliveries, Delivery Performance, Expedited Delivery: 
  

	3.1	 Allegro will provide, by the 15th of each calendar month,
a six (6) month, rolling forecast, for months subsequent to the current month, of the total Production Wafers required, by process technology. The forecast will be used for planning purposes only and does not represent a commitment by Allegro
to make any purchases beyond as agreed to in Section 6.2. 

  

	3.2	 Allegro will issue purchase orders for each of the following: (1) Engineering Wafers, (2) Production
Wafers, and (3) Process Qualification Wafers. 

	3.3	 Allegro’s purchase requirements, with requested delivery dates, will be submitted weekly via a purchase
order, and/or a purchase order release, and will result in a binding purchase obligation by Allegro to PSL, subject to cancellation charges, as set for in Section 3.5. PSL will acknowledge and provide a scheduled ship date in writing for each
purchase requirement within [XXX]. Cycle-time requirements will be as defined in Appendix G. Any changes to Appendix G will require the Parties written mutual agreement. PSL will commence Production Wafer starts within ten (10) business days
following the acknowledgment to the extent accepted. PSL will commence Engineering Wafer starts within three (3) business days following the acknowledgment to the extent accepted. 

 

	3.4	 PSL will provide Allegro with real-time, on-line access to Allegro Work
in Progress (WIP) and delivery information. PSL will promptly notify Allegro of any delivery deviations beyond the tolerance specified in Sections 3.6 and 3.7. 

 

	3.5	 Purchase orders for Wafers are cancelable. Purchase Order cancellations for Wafers will incur charges (Wafer
Termination Charges) for WIP, according to the following schedule: 

  

									
	 	  	Process Technologies
(Excluding [XXX])	 	  	[XXX]	 
	 Before Wafer Scribe
	  	 	[XXX]% of Wafer Price	 	  	 	[XXX]% of Wafer Price	 
			
	 Prior to Device Mask
	  	 	[XXX]% of Wafer Price	 	  	 	[XXX]% of Wafer Price	 
			
	 Subsequent to Device Mask and Prior to Resistor Mask
	  	 	[XXX]% of Wafer Price	 	  	 	[XXX]% of Wafer Price	 
			
	 Subsequent to Resistor Mask and Prior to Contact Mask
	  	 	[XXX]% of Wafer Price	 	  	 	[XXX]% of Wafer Price	 
			
	 Subsequent to Contact Mask
	  	 	[XXX]% of Wafer Price	 	  	 	[XXX]% of Wafer Price	 

 All Wafer lots on hold, in excess of [XXX] days, will be reviewed by Allegro and PSL. This review will result
in a formal determination of whether the lots should be terminated, finished or remain on hold. After [XXX] days of a Wafer lot being placed on hold, and provided that PSL notifies Allegro’s Director of Planning in writing within [XXX] business
days, Wafers can be terminated by PSL and termination charges, as set forth in this Section 3.5, are applied. 
  

	3.6	 Delivery Performance. Delivery performance goal is [XXX]%
on-time delivery for all purchase orders issued and accepted by PSL for a specified time period, as set forth in Allegro’s purchase order and/or release ([XXX] days early, [XXX] day late to the specified
delivery date). Failure to meet [XXX]% on time delivery for [XXX] consecutive weeks will require PSL to submit a corrective action plan and provide up to [XXX] to Allegro at no charge until the delivery performance improves and meets [XXX]% on time
delivery for [XXX] consecutive weeks. 

	3.7	 Expedited Delivery. PSL agrees to provide expedited delivery of 6” and 8” Production Wafer
lots as follows: 

  

			
	6” Hot Lots * -	  	Up to [XXX] actively running lots at any given time.
	6” Nuclear Lots **-	  	Up to [XXX] actively running lot at any given time.

  

	•6”	 Hot Lots are defined as lots with a fab process technology lead time not to exceed a cycle time of [XXX] days
([XXX] hours) per mask level for the PSL interval (maximum of [XXX] Wafers per lot). 

  

	**6”	 Nuclear Lots are defined as lots with a fab process technology lead-time not to exceed a cycle time of [XXX]
day ([XXX] hours) per mask level for the PSL interval (maximum of [XXX] Wafers per lot). 

  

			
	8” Hot Lots * -	  	Up to [XXX] actively running lots at any given time.
	8” Nuclear Lots **-	  	Up to [XXX] actively running lot at any given time.

  

	•8”	 Hot Lots are defined as lots with a fab process technology lead time not to exceed a cycle time of [XXX] days
([XXX] hours) per mask level for the PSL interval (maximum of [XXX] Wafers per lot). 

  

	**8”	 Nuclear Lots are defined as lots with a fab process technology lead-time not to exceed a cycle time of [XXX]
days ([XXX] hours) per mask level for the PSL interval (maximum of [XXX] Wafers per lot) 

 Section 4.
    Facility Visits, Audits, and Operational Reviews: 
  

	4.1	 Facility visits and audits (by customers and/or Allegro) are permitted, for any reason or purpose, on a
reasonable basis and any such visits and audits will be conducted, upon Allegro providing reasonable notice to PSL, during PSL’s regular business hours and without undue disruption of PSL’s business. Allegro, at its discretion, may
schedule operational reviews with PSL on a quarterly basis. 

 Section 5.    Procedure for Wafer Return and
Credit: 
  

	5.1	 Allegro will notify PSL in writing of its reasons for rejection of Production Wafers and provide product
information and engineering data within [XXX] days following Allegro’s receipt of such Production Wafers. Such data will include, as applicable: 

  

	 	5.1.1	 Optical and electrical data from Production Wafers; and/or 

 

	 	5.1.2	 Yield data for Production Wafers failing to meet the probe yield target per device, as set forth in Appendix
H. 

  

	 	5.1.3	 Product information will include product name, lot number, quantity, purchase order number, and date of receipt
at Allegro. 

  

	 	5.1.4	 If any Production Wafers pass the acceptance criteria, specified in Sections 5.1.1 and 5.1.2, but are rejected
by Allegro, or Allegro’s customer, at a subsequent date still within the warranty period, as specified in Section 8, due to the fact that the failure is process related, Allegro will notify PSL in writing without undue delay.

	5.2	 Allegro will notify PSL in writing its reasons for rejection of Engineering Wafers and provide product
information and engineering data within [XXX] days following Allegro’s receipt of such Engineering Wafers. Such data will include, as applicable: 

  

	 	5.2.1	 Optical and electrical data product information will include product name, lot number, quantity, purchase order
number, and date of receipt at Allegro. 

  

	5.3	 PSL shall provide Allegro an accept or reject response within [XXX] days following PSL’s receipt of
supporting information and data as stated in Section 5.1 and 5.2. If no written response is provided by PSL within [XXX] days of its receipt of all data and product required to make a determination, the rejection shall be deemed as valid
and accepted by PSL. Formal Return Material Authorizations (“RMA”) shall be issued by PSL within [XXX] business days. For Production Wafers failing to meet the probe yield target per device, as set forth in Appendix H. If a rejection
submitted by Allegro is not accepted by PSL and challenged by Allegro, resolution will be addressed by the Allegro and PSL Directors of Quality or their designees. 

Section 6.    Wafer/Mask Price, Payment, and Invoices: 

 

	6.1	 The prices of Production Wafers, Engineering Wafers and Masks will be established and fixed for [XXX] as
mutually agreed to in writing by the Parties. All prices are on an ExWorks Bloomington, Minnesota basis for the term of this Agreement, except for replacement Wafers for which PSL will pay all applicable shipping charges. All prices stated in this
Agreement are in U.S. Dollars. All prices stated in this Agreement are exclusive of all applicable state and local sales, use, and other similar taxes. Unless Allegro advises PSL in writing, reasonably acceptable to PSL that an exemption applies,
Allegro will pay all applicable state and local sales, use and other similar taxes. Taxes payable by Allegro will be billed as separate items. 

  

	6.2	 Allegro and PSL shall establish a six month binding forecast as well as the corresponding Wafer and Mask
pricing associated to this forecast on a fiscal half year basis. The forecast and pricing will be finalized no later than [XXX] days prior to the start of the new fiscal half year period (April and October). Wafer pricing will be established
based on the forecasted volumes. Mutually agreed upon pricing adjustments will be established during the price setting sessions for increases or decreases beyond [XXX] of the six month forecast. 

 

	6.3	 PSL will issue an invoice with each shipment, and the date on this invoice will be no earlier than the shipment
date, with the shipment date referenced on the invoice. The invoice will include the purchase order number, purchase order line number, purchase order line description, purchase order quantity, purchase order unit of measure, and purchase order unit
price. 

	6.4	 All payments due PSL under this Agreement will be delivered to PSL at the address shown on its invoice, net
[XXX] and Allegro reserves the right to any credit setoff. Notwithstanding the foregoing, Allegro will not be obligated to pay invoices for Wafers for which an RMA number has been issued or for which an RMA request is pending. 

 

	6.5	 Allegro will bear all taxes, duties, levies and similar charges (and any related interest and penalties),
however designated, in connection with the existence of this Agreement, or the transactions contemplated thereby, other than income taxes imposed upon PSL by any governmental authority in any jurisdiction. 

Section 7.     Title and Risk of Loss: 
  

	7.1	 Title and risk of loss and damage to all Wafers purchased by Allegro will vest in Allegro when the Wafers are
placed by PSL in the possession of a carrier at the F.O.B. point of origin, freight collect, with freight charges being billed directly by the carrier to Allegro. PSL will pack and ship Wafers, as set forth in Appendix I. 

Section 8.     Warranty/Liability: 
  

	8.1	 Warranty/Liability 

For a period of [XXX] from the receipt of the Production Wafers by Allegro, PSL warrants that all Production Wafers shall be (i) free
from defects in manufacturing; and (ii) conform to the specifications, and Wafer and electrical specifications, stated in Appendix A. 

8.1.1 In the event that PSL and Allegro disagree on the cause and/or ownership of nonconformities, PSL and Allegro shall attempt to resolve
their differences by referring the matter to their respective heads of operations or their designees for resolution. If the matter remains unresolved, PSL and Allegro may use a mutually agreed third party technical consultant to assist in resolving
the matter. The cost of utilizing technical consultant(s) shall be borne equally by PSL and Allegro. 
 8.1.2 Cost of Warranty/Non
Compliance. Subject to Section 8.1.3 in this Agreement, PSL shall reimburse Allegro for Allegro’s reasonable and verifiable costs incurred for product recalls, and the sorting, inspection, replacement, repair, disposal and/or re-shipment of defective products resulting from the nonconformity of any Wafer(s). 
 8.1.3 The maximum
liability of PSL pursuant to this Agreement during any [XXX] month period shall be limited to [XXX] of the previous [XXX] months overall cumulated sales between PSL and Allegro or [XXX] Dollars whichever is greater. All liability costs
must be verified and mutually agreed on by PSL and Allegro and must exceed a minimum of [XXX] Dollars before a claim for liability is made by Allegro. 

8.1.4 The limimitions of liability in Section 8.1.3 shall not apply to liability for intellectual property rights infringement
indemnification. 
 8.1.5 Except as otherwise stated in this Agreement, neither Party shall be liable to the other Party, whether in
contract, in tort (including negligence), under any warranty or otherwise for any special, punitive, indirect, incidental, consequential loss or damage or loss of profits or revenues resulting from, arising out of or in connection with this
Agreement. 

	8.2	 Remedies. In addition to any other remedies in this Agreement, Production Wafers failing to conform to
any warranty during the relevant warranty period with prompt written notification to PSL, following the discovery of such failure, PSL will, at Allegro’s sole option, either [XXX], or provide to Allegro [XXX], as applicable. The foregoing
notice from Allegro will include a description of the basis for Allegro’s warranty claim, lot number, and original date received by Allegro. To the extent practicable (for example, provided that the Wafers have not been shipped to a customer),
Allegro will return such defective Production Wafers to PSL, and, if such defective Wafers have already been packaged, PSL will [XXX] for such Wafers. PSL will return any Production Wafers replaced under any warranty to Allegro, transportation
prepaid. 

  

	8.3	 LIMITATIONS. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESS, IMPLIED OR
STATUTORY, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WHICH ARE HEREBY EXPRESSLY DISCLAIMED. 

Section 9.    Intellectual Property: 
  

	9.1	 PSL agrees to and shall, at its option, either negotiate and/or defend all claims, suits or proceedings brought
against Allegro if the manufacturing of any product supplied hereunder that uses any PSL originated unit process, manufacturing process, or technology constitutes an infringement of any patent, provided PSL is notified promptly in writing and given
complete authority and information required for the defense or settlement of same. PSL shall pay all judgments, decrees, compromises, costs (including attorneys fees) and expenses arising from any charge or infringement against Allegro, but PSL
shall not be liable for compromises incurred or made by Allegro without PSL’s prior written consent. Where PSL’s compliance with Allegro’s designated designs or specifications furnished by Allegro results in an infringement, Allegro
shall defend, indemnify and hold PSL harmless against any claim of infringement of any patent. 

  

	9.2	 The foregoing Section 9.1 state the entire liability of the Parties for any patent, trademark, copyright,
or other proprietary right infringement. 

 Section 10.    Identification: 

 

	10.1	 PSL will not, without Allegro’s prior written consent, engage in advertising, promotion or publicity
related to this Agreement, or make public use of any Identification (as hereinafter defined) in any circumstances related to this Agreement. As used in this Agreement, the term “Identification” means any copy or semblance of any trade
name, trademark, service mark, insignia, symbol, logo, or any other product, service or organization designation, or any specification or drawing of Allegro or its respective affiliates, or evidence of inspection by or for any of them.

  

	10.2	 PSL will remove or destroy any Identification prior to any use or disposition of any Wafers rejected or not
purchased by Allegro, and, will indemnify, defend (at Allegro’s request) and 

	 	
save harmless Allegro and its respective affiliates and each of their officers, directors and employees from and against any losses, damages, claims, demands, suits, liabilities, fines, penalties
and expenses (including reasonable attorneys’ fees) arising out of the PSL’s failure to so remove or obliterate Identification. 

Section 11.    Protection of Proprietary Information: 

 

	11.1	 The Non-Disclosure Agreement between PSL and Allegro having an
effective date of October 25, 2005, is hereby incorporated in its entirety into this Agreement. 

Section 12.    Term, Termination of Agreement and Bankruptcy: 

 

	12.1	 Term; The term of this Agreement will commence on the date first written above and continue through
February 12, 2018, unless terminated earlier, pursuant to Sections 12.2, 12.3, or 12.4. 

  

	12.2	 Immediate Termination Events. Either Party may terminate or suspend this Agreement immediately and
without liability upon written notice to the other Party, if any one of the following events occurs: 

  

	 	(a)	 The other Party files a voluntary petition in bankruptcy or otherwise seeks protection under any law for the
protection of debtors; 

  

	 	(b)	 A proceeding is instituted against the other Party under any provision of any bankruptcy law, which is not
dismissed within ninety (90) days; 

  

	 	(c)	 The other Party is adjudged bankrupt; 

 

	 	(d)	 A court assumes jurisdiction of all or a substantial portion of the assets of the other Party under a
reorganization law; 

  

	 	(e)	 A trustee or receiver is appointed by a court for all or a substantial portion of the assets of the other
Party; 

  

	 	(f)	 The other Party becomes insolvent or ceases or suspends all or substantially all of its business; or

  

	 	(g)	 The other Party makes an assignment of the majority of its assets for the benefit of creditors.

  

	12.3	 Termination for Breach. In case either Party breaches or defaults in the effective performance of any of
the terms, conditions, covenants, or agreements contained in this Agreement, then the Parties will first attempt in good faith to resolve such breach. [XXX] after delivery of written notice to the breaching Party that a breach, described in this
Section 12.3 has occurred, the non-breaching Party may terminate this Agreement without liability for such termination; provided, that if the breaching Party has begun substantial corrective action to
remedy the breach, the non-breaching Party may only terminate this Agreement without liability for such termination [XXX] after delivery of its written notice to the breaching Party, if such breach remains
uncured as of such date; provided, however, that if allowing [XXX] for the breaching Party to cure the breach would cause irreparable harm to the business prospects of the 

	 	
non-breaching Party, notwithstanding any dispute resolution provisions herein to the contrary, temporary or preliminary injunctive relief in a court of
competent jurisdiction will be appropriate to prevent either an initial or continuing breach in addition to any other relief to which the non-breaching Party may be entitled. 

 

	12.4	 In case that PSL terminates this Agreement, pursuant to Section 12.3, Allegro will be liable for any and
all Wafer finished goods and Work-in-Process held by PSL at the time of termination, and resulting from an order issued by Allegro hereunder. In case that Allegro
terminates this Agreement, pursuant to Section 12.3, Allegro may cancel any or all orders without any liability to PSL. 

  

	12.5	 Notwithstanding any provision of this Agreement, subject to its compliance with the following, PSL will have
the right to terminate this Agreement in the event it ceases operations at its Bloomington, Minnesota facility: 

  

	 	12.5.1	 PSL will give Allegro at least twenty-four (24) months prior written notice prior to the date PSL ceases
operations at its Bloomington, Minnesota foundry. 

  

	 	12.5.2	 In addition to its rights to purchase Wafers under this Agreement, Allegro will have the option during such
twenty-four (24) month period, described in 12.5.1, to place, and PSL will fulfill regardless of any Wafer production capacity commitment, as set forth in Appendix D, a “life-time” purchase order for Wafers, provided that such
“life time” purchase order is issued by Allegro at least [XXX] prior to the closing of the facility, with deliveries not to extend beyond [XXX] from planned closure. 

 

	 	12.5.3	 PSL will bear all costs (including all Allegro’s costs) associated with the product and process
qualification of, and the reticle transfer to, a new fabrication line (including within the Bloomington facility) for the manufacture of the Wafers where the transfer is a PSL initiated requirement. 

 

	12.6	 In the event that PSL becomes the subject of voluntary, or involuntary, petition in bankruptcy, or any
proceeding related to insolvency or composition for the benefit of creditors, and such proceeding is not dismissed within [XXX], PSL agrees to grant Allegro the right to access the PSL WMT and a non-exclusive,
worldwide, royalty-free license, with the right to grant sublicenses, to use the manufacturing processes comprising the PSL WMT in order to make, or have made, Wafers that PSL would have otherwise been obligated to manufacture and supply to Allegro
in compliance with this Agreement, but for such bankruptcy, insolvency or composition for the benefit of creditors. Such license shall terminate upon the earlier of (i) such time that PSL emerges from any such bankruptcy or insolvency
proceeding and (ii) such time that this Agreement would have otherwise terminated in accordance with its terms; upon any such termination, Allegro shall cease any further use of such manufacturing processes, other inventions and the PSL WMT.
Such right of access to the PSL WMT and license shall be effected through PSL’s prompt provision to Allegro of complete and full disclosure to Allegro of all PSL WMT used to manufacture and supply Wafers to Allegro, including, without
limitation, the PSL WMT Documentation, and any and all Allegro WMT Documentation then in the possession of PSL. Such full and complete disclosure of PSL’s WMT and delivery of the Allegro WMT Documentation will be provided to Allegro without
delay. In the event PSL emerges from any such bankruptcy, or insolvency proceeding, the PSL WMT (including, without limitation, the PSL WMT Documentation) will be returned to PSL, and PSL will resume manufacture and supply of Wafers to Allegro, in
accordance with the terms and conditions of this Agreement. 

	12.7	 Survival of Obligations. The following Sections will survive any expiration, termination or cancellation
of this Agreement, and the Parties will continue to be bound by the terms and conditions thereof: 8, 9, 10, 11, 12.4, 12.6, 15, 18, 19, 21, and 26. 

Section 13.     Force Majeure: 
  

	13.1	 Neither Party will be held responsible for any delay or failure in performance of any part of this Agreement,
to the extent such delay or failure, is caused by fire, flood, explosion, war, embargo, government requirement, civil or military authority, act of God, act or omission of carriers, or other similar causes beyond its control and without the fault or
negligence of the delayed or nonperforming Party or its subcontractors (“force majeure conditions”). Notwithstanding the foregoing, PSL’s liability for loss or damage to Allegro’s material in PSL’s possession or control will
not be modified by this clause. If any force majeure condition occurs, the Party delayed or unable to perform will give immediate notice to the other Party, stating the nature of the force majeure condition and any action being taken to avoid or
minimize its effect. The Party affected by the other’s delay or inability to perform may elect to: (1) suspend this Agreement or an order for the duration of the force majeure condition and (i) at its option buy, sell,
obtain or furnish elsewhere material or services to be bought, sold, obtained or furnished under this Agreement or an order (unless such sale or furnishing is prohibited under this Agreement) and deduct from any commitment the quantity bought, sold,
obtained or furnished or for which commitments have been made elsewhere and (ii) once the force majeure condition ceases, resume performance under this Agreement or order with an option to the affected Party to extend the period of this
Agreement or an order up to the length of time the force majeure condition endured and/or (2) when the delay or nonperformance continues for a period of at least [XXX], terminate, at no charge, this Agreement or an order, or the part of it
relating to material not already shipped, or services not already performed. Unless written notice is given within [XXX] after the affected Party is notified of the force majeure condition, (1) will be deemed selected. 

In the event that force majeure conditions prevent PSL from manufacturing and supplying Wafers to Allegro, in accordance with this Agreement,
for a period of [XXX], Allegro shall have the option to require PSL to promptly deliver to Allegro copies of all PSL WMT Documentation and Allegro WMT Documentation then in PSL’s possession and to grant to Allegro a license to use the PSL Wafer
Manufacturing Technology to the extent necessary and sufficient for Allegro to make or have made, use or have used, sell or have sold, import or have imported, and otherwise commercialize Wafers for a period of time equal to the duration of the
Force Majeure event preventing PSL’s performance. 
 Section 14.    Emergency Backup Plan: 

 

	14.1	 Within [XXX] of the execution of this Agreement, PSL will furnish to Allegro, a written plan of action (an
“Emergency Backup Plan”) that covers PSL’s plans on how it will continue to perform its obligations under this Agreement in case of an unforeseen catastrophe, including a force majeure condition, or any other condition in which PSL
will be unable to produce and ship Wafers for [XXX] weeks. The Emergency Backup Plan will identify PSL’s secondary manufacturing location(s), if any, and include the estimated time for the implementation of such Emergency Backup Plan and
production of Wafers. 

 Section 15.     Notices: 

 

	15.1	 All notices, demands, or consents required or permitted hereunder will be in writing and will be delivered,
delivered by e-mail, or sent by facsimile, or mailed to the respective Parties at the addresses set forth below, or at such other address as will have been given to the other Party, in writing for the purposes
of this clause. 

 Such notices and other communications will be deemed effective upon the earliest to occur of: 

 

	 	(a)	 Actual delivery (e-mail, facsimile, hard copy), 

 

	 	(b)	 Five (5) days after mailing, addressed and postage prepaid, return receipt requested,

  

			
	To Allegro:	  	Allegro MicroSystems, LLC
		  	115 Northeast Cutoff
		  	Worcester, MA 01606
		  	Attention: Vice President of Operations
		  	Phone: [***]
		
	With a Copy to:	  	Allegro MicroSystems, LLC
		  	115 Northeast Cutoff
		  	Worcester, MA 01606
		  	Attention: General Counsel
		  	Phone: [***]
		
	To PSL:	  	Polar Semiconductor, LLC
		  	2800 East Old Shakopee Road
		  	Bloomington, MN 55425
		  	Attn: Chief Operating Officer
		  	Phone: [***]

 Section 16.     Waiver and Amendment: 

 

	16.1	 Failure by either Party, at any time, to require performance by the other Party, or to claim a breach of any
provision of this Agreement, will not be construed as a waiver of any right accruing under this Agreement, nor will it affect any subsequent breach or the effectiveness of this Agreement, or any part hereof, or prejudice either Party with respect to
any subsequent action. A waiver of any right accruing to either Party, pursuant to this Agreement, will not be effective unless given in writing. 

Section 17.     Assignment: 
  

	17.1	 Neither Party will assign, transfer, or otherwise dispose of this Agreement in whole or in part, without the
prior written consent of the other Party, and such consent will not be 

	 	
unreasonably withheld provided, however, that this Agreement may be assigned by either Party to any successor entity, whether by merger, consolidation, or acquisition of all or substantially all
of the assets of such Party related to the performance of this Agreement. Upon the completion of such assignment, the assigning Party will promptly provide a written notice to the other Party to this Agreement. 

Section 18.     Governing Law: 
  

	18.1	 This Agreement shall be governed by and construed in accordance with the laws of the Commonwealth of
Massachusetts except that its conflict of laws principles shall not be used. 

 Section 19.    Compliance
with Laws; Environmental Compliance: 
  

	19.1	 PSL, and all persons furnished by PSL, will comply at their own expense with all applicable federal, state and
local laws, ordinances, regulations and codes, including those relating to the use of chlorofluorocarbons, and including the identification and procurement of required permits, certificates, licenses, insurance, consents and inspections in
performance under this Agreement. 

  

	19.2	 PSL agrees to meet the requirements associated with Environmental Compliance, as set forth in the attached
Appendix J. 

 Section 20.     Severability: 

 

	20.1	 In the event that any provision of this Agreement is found to be unlawful or otherwise unenforceable, such
provision will be severed, and the entire Agreement will not fail on account thereof, the balance continuing in full force and effect, and the Parties will endeavor to replace the severed provision with a similar provision that is not unlawful or
otherwise unenforceable. 

 Section 21.     Exports: 

 

	21.1	 The Parties agree and stipulate that no Wafers, technical information, or other information furnished under
this Agreement or any direct product thereof, will be exported or re-exported, directly or indirectly, to any destination restricted or prohibited by export regulations of the United States, without the
authorization from the competent governmental authorities. Any successor provisions to the export regulations apply to all future export and re-export transactions and the requirements of this Section will
survive indefinitely, including any termination of this Agreement. Should a Party to this Agreement be held to have breached any applicable export regulations, such Party will indemnify and hold harmless the other Party from any costs or damages
actually incurred by the non-breaching Party, to the extent that such non-breaching Party is held not accountable for such breach by competent governmental authorities.

 Section 22.     Headings: 

 

	22.1	 The headings of the various sections of this Agreement have been inserted for convenience of reference only and
will not be deemed to be a part of, or affect the interpretation of, any provision of this Agreement. 

 Section 23.    Counterparts: 

 

	23.1	 This Agreement may be executed in any number of counterparts, and each such counterpart hereof will be deemed
to be an original instrument, but all such counterparts together will constitute but one Agreement. 

 Section 24.
    Communication and Representatives: 
  

	24.1	 Throughout the term hereof, each Party agrees to designate in writing one of its employees to represent it in
connection with day-to-day operations under this Agreement. 

Section 25.    Rights of Non-Submitting Party to Comment (Public Disclosure):

  

	25.1	 The Parties to this Agreement shall consult with each other as to the form, substance and timing of any press
release or other public disclosure related to this Agreement, or the transactions contemplated hereby, and no such press release or other public disclosure shall be made without the prior written consent of the other Party hereto, which consent
shall not be unreasonably withheld or delayed. Each Party shall determine in its sole discretion whether such Party is required to file or otherwise submit this Agreement with, or to, any governmental authorities, including, without limitation, the
U.S. Securities and Exchange Commission. If a Party (as the Submitting Party) determines that this Agreement is required to be so filed or submitted, then such Submitting Party shall with respect to such proposed filing or submission:
(i) provide a copy of such filing or submission to the other Party (as the Non-Submitting Party) reasonably prior to its filing or submission, (ii) identify to the extent that the Submitting Party
intends to request confidential treatment for any portion or portions of this Agreement, (iii) provide a reasonable amount of time for the Non-Submitting Party’s review of the filing or submission
and such confidentiality request and any redactions comprising such intended request and (iv) give good faith consideration to the Non-Submitting Party’s comments and requests for any additional or
different redactions. 

 Section 26     Integration: 

 

	26.1	 This Agreement, and each Appendix, attached, sets forth the entire Agreement and understanding between the
Parties, as to the subject matter hereof, and merges all prior discussions between them, and none of the Parties will be bound by any conditions, definitions, warranties, modifications, understandings or representations with respect to such subject
matter other than as expressly provided herein, or as duly set forth on or subsequent to the effective date hereof in writing and signed by a proper and duly authorized representative of the Party to be bound thereby. This Agreement supersedes and
replaces in its entirety the Agreement between Allegro MicroSystems, Inc. and PolarFab (presently PSL) dated January 29, 2001 and the agreement between PSL and Allegro dated August 1, 2007. This Agreement may be modified or amended as set forth in
writing and signed by a duly authorized representative of each Party. 

 Section 27.     Relationship
Between Parties: 
  

	27.1	 Neither Party to this Agreement will have the power to bind the other by any guarantee or representation that
it may give, or to incur any debts or liabilities in the name of or on behalf of the other Party. The Parties acknowledge and agree that nothing contained in this Agreement will be deemed or construed to constitute or create between the Parties
hereto a partnership, association, joint venture or other agency. 

 Section 28.     No Implied Licenses: 

 

	28.1	 No licenses are granted hereunder by implication, estoppel or otherwise. Each Party may make reasonable
references by name to any other Party in its advertising material relative to Wafers, provided that the prior written consent of an authorized representative of the other Party has been obtained. 

Section 29.     No Third-Party Beneficiaries: 
  

	29.1	 No person not a Party to this Agreement will have any rights under this Agreement as a third-party beneficiary,
or otherwise, other than persons entitled to indemnification as expressly set forth herein. 

 Section 30.
    Dispute Resolution: 
  

	30.1	 In the event of any dispute, claim, question, or disagreement arising from, or relating to this Agreement, the
Parties hereto shall use their best efforts to settle the dispute, claim, question, or disagreement. To this effect, they shall consult and negotiate with each other in good faith and, recognizing their mutual interests, attempt to reach a just and
equitable solution satisfactory to both Parties. If they do not reach such solution within a period of [XXX], then, upon notice by either Party to the other, all such disputes, claims, questions, or differences shall be finally settled by
arbitration administered by the American Arbitration Association in accordance with the provisions of its Commercial Arbitration Rules. All aribitartion proceedings shall take place in Massachusetts or as otherwise mutually agreed to by the Parties.
Judgment on the award rendered by the Arbitrator(s) may be entered in any court having jurisdiction thereof. 

 IN WITNESS WHEREOF,
the Parties hereto have executed this Agreement, as of the Effective Date first above written. 
  

			
	Allegro MicroSystems, LLC
		
	By:	 	 /s/ Dennis H. Fitzgerald

	Name:	 	Dennis H. Fitzgerald
	Title:	 	President & Chief Executive Officer
	
	Polar Semiconductor, LLC
		
	By:	 	 /s/ Yoshihiro Suzuki

	Name:	 	Yoshihiro Suzuki
	Title:	 	President & Chief Executive Officer

 APPENDIX A 

APPLICABLE SPECIFICATIONS 

AND 
 WAFER EVALUATION
ACCEPTANCE CRITERIA 
 [XXX] 

 APPENDIX B 

MASS PRODUCTION WAFER 

APPROVAL REQUIREMENTS AND PROCEDURES 

[XXX] 

 APPENDIX C 

INTENTIONALLY LEFT BLANK 

 APPENDIX D 

WAFER LOT SIZES 
  

					
	 Wafer Type
	  	# of Wafers Per Lot	 
	 6” Engineering Wafers
	  	 	[XXX	] 
	 6” Production Wafers
	  	 	[XXX	] 
	 6” Process Qualification Wafers
	  	 	[XXX	] 
		
	 Wafer Type
	  	# of Wafers Per Lot	 
	 8” Engineering Wafers
	  	 	[XXX	] 
	 8” Production Wafers
	  	 	[XXX	] 
	 8” Process Qualification Wafers
	  	 	[XXX	] 

 APPENDIX E 

RELIABILITY AND PROCESS CONTROL INFORMATION 

[XXX] 

 APPENDIX F 

ALLEGRO’S QUALITY PLAN 

[XXX] 

 APPENDIX G 

PSL CYCLE TIME BY WAFER TECHNOLOGY 

[XXX] 

 APPENDIX H 

PROBE SCRAP LIMITS 
 [XXX]

 APPENDIX I 

SHIPPING CRITERIA 
 All Wafers to be
delivered to Allegro under this Agreement will be packed, marked, and shipped by PSL, [XXX], as outlined in the Quality Manual, and care for transportation of Wafers of a similar type. All Wafers will be accompanied by the following information, as
appropriate: (i) purchase order number, (ii) Device Type, (iii) Allegro lot number, (iv) lot quantity and (v) any process information, to be mutually agreed upon in writing by both Parties. Items (i),(ii), (iii), and
(iv) will be clearly marked on the outside of each Wafer cassette, shipping carton and reflected on the Packing Slip by PSL. Shipments are ExWorks, via an Allegro nominated carrier. PSL is the exporter of record for all export international
shipments. PSL will make daily shipments via Federal Express Priority Overnight unless modified by Allegro. In the event of a return shipment, whereby a RMA # is issued to Allegro from PSL, all transportation costs (freight, insurance and liability)
are [XXX]. 

 APPENDIX K 

ALLEGRO WAFER MANUFACTURING TECHNOLOGY 

AND 
 PSL WAFER
MANUFACTURING TECHNOLOGY 
 [XXX]EX-10.9

 [XXX] Certain information in this document has been excluded pursuant to Regulation S-K, Item 601(b)(10).
Such excluded information is not material and would likely cause competitive harm to the registrant if publicly disclosed. 
 Exhibit
10.9 
 IC TECHNOLOGY DEVELOPMENT AGREEMENT 

THIS IC TECHNOLOGY DEVELOPMENT AGREEMENT (“Agreement”) is entered into as of May 28, 2009 by and among Polar Semiconductor, Inc., a
Delaware corporation headquartered in Bloomington, Minnesota (“PSI”); Sanken Electric Co., Ltd., a Japanese corporation headquartered in Saitama, Japan (“Sanken”); and Allegro MicroSystems, Inc., a Delaware corporation
headquartered in Worcester, Massachusetts (“Allegro”). Such parties are singularly referred to herein as a “Party” and collectively referred to as “Parties.” 

WHEREAS, the Parties may, from time to time, cooperate in the development of new technology with the anticipation that such technology may be used by
PSI to manufacture products for Sanken and Allegro; and 
 WHEREAS, the Parties wish to stipulate the terms and conditions that will apply to such
technology development; and 
 WHEREAS, the Parties have entered into several prior agreements concerning technology development, and wish to
integrate such agreements into a single agreement that will act as a successor to the prior agreements. 
 NOW, THEREFORE, the Parties hereby agree
as follows: 
 1.     Development Activities. The Parties may, from time to time, agree upon certain technologies to be
developed pursuant to this Agreement. In such case, the Parties will cooperate to establish an IC process road map and agree upon the process development and enhancement activities necessary to implement such road map (the “Development
Activities”). The technology resulting from the Development Activities, together with derivatives thereof, is referred to herein as the “Technology.” 

2.     Development Team. The Parties have established an IC Process Development Steering Committee (hereinafter the
“Team”) to agree upon and monitor the Development Activities. The Team will be comprised of an equal number of members from each Party representing both the business and technology segments of each Party. Unless otherwise agreed by the
Parties, the Team will not exceed twelve (12) members. It is anticipated that the Team will meet on a quarterly basis. The technology roadmap for the Development Activities shall be based upon requirement inputs from Allegro and Sanken and shall be
updated at least annually. The Team will describe the anticipated process technology required and review the progress of the Development Activities. The responsibilities of each Party’s development teams to accomplish the technology roadmap
activities, and the establishment, validation! and prioritization of items on the technology roadmap, will be agreed upon by the Team. 

 3.     Staffing. In order to conduct the Development Activities, PSI will
maintain an advanced technology group and will evaluate and install new process modules. PSI will be responsible for and will have sole discretion regarding staffing and personnel assignments required to complete PSI’s portion of the
Development Activities. Allegro and Sanken may assign staff to these projects as agreed to by the Team, and may station employees at PSI to work on the Development Activities. 

4.     Expense of Development Activities. Sanken and Allegro [XXX]. On an annual basis, the Parties will mutually agree upon
(a) the fee to be paid to PSI by Sanken and Allegro for the ensuing fiscal year for these designated expenses (the “Annual Fee”); (b) the timing of payment of the Annual Fee; and (c) any applicable assumptions concerning the
designated expenses or other items that are included or excluded with the Annual Fee. PSI will bear responsibility for any expense that exceeds the Annual Fee. 

5.     Outside Party Involvement. The Parties may from time to time mutually decide to procure assistance or technology from
unrelated parties in connection with the Development Activities. Any contracts with such unrelated parties, or any arrangements between the Parties concerning payments to such parties, shall have such terms as the Parties shall mutually agree and
need not be attached as exhibits to this Agreement. Notwithstanding the foregoing, any Party may independently engage its own outside consultant concerning the Development Activities at its own expense. 

6.     Manufacturing for Sanken or Allegro. PSI and Sanken or Allegro, as applicable, will agree upon reasonable prices and
terms for products manufactured for Sanken or Allegro by PSI using the Technology. The Parties anticipate that such pricing will incorporate the benefits of yield improvements and cost reductions. Sanken or Allegro, as applicable, will provide good
faith quarterly and long-range forecasts of products to be purchased from PSI, and PSI will reserve and/ or install such capacity for Sanken or Allegro. 

7.     Transfer of Technology. While the intention of the Parties is that PSI will manufacture products based on the
Technology, Sanken or Allegro may, in the following limited situations, transfer an applicable portion of the Technology to an alternative manufacturing site: (a) a Party’s reasonably projected purchase requirements exceeds PSI’s
capacity and/ or allocations to such Party; (b) material quality or delivery nonperformance with respect to products based on the Technology, provided that some reasonable early warning triggers of material nonperformance will be developed by
the Parties; (c) Sanken or Allegro requires a second source for security of supply or dual sourcing due to business conditions and/or customer contractual requirements, provided that a substantial volume of production shall continue to be
purchased from PSI as negotiated with the applicable Party; or (d) transfer to a new owner of Sanken or Allegro. 

  
 2 

 8.     PSI Intellectual Property. Except as set forth in this
Section 8, PSI will retain ownership of all intellectual property that PSI owned prior to the Development Activities. The exception is that Sanken and Allegro shall have a nonexclusive license for the applicable portion of so-called Polar 35 technology, which is a technology upon which some of the Technology will be developed pursuant to the Development Agreement. PSI acknowledges receipt of $[XXX] from each of Sanken and Allegro as
compensation for such license. Such license shall continue for as long as Allegro and/ or Sanken use (either directly or by transfer permitted herein) any of the Technology developed pursuant to this Agreement. 

9.     Ownership of the Technology. Sanken, Allegro and PSI shall jointly own the Technology developed pursuant to this
Agreement subject to the following exceptions: (a) Allegro shall have sole ownership of all intellectual property related to the design and manufacture of magnetic sensors; and (b) Sanken and Allegro shall jointly own the SG5 technology
and its derivatives. Neither Sanken, Allegro, nor PSI shall sell, assign or transfer any of the Technology to any other party without the written consent of any other Party who has joint ownership in the Technology or as expressly permitted under
this Agreement. Sanken and Allegro shall have the right of access to the details of the Technology. Technology that is not subject to one of the exceptions set forth in subsection (a) or (b) above shall, unless otherwise agreed to in writing by
the Team, be jointly owned by all three Parties. 
 10.     PSI Use of SG5 Technology. With respect to that portion of the
Technology that is SG5 technology and its derivatives (which portion is jointly owned by Sanken and Allegro pursuant to Section 9), PSI may use individual unit processes within SG5 or its derivatives (such as devices, models, process design
kit, process control module, electrical test code for process control module, characterization reports, qualification reports, application notes, etc.) in the conduct of its business and manufacturing for others. Such elements of the Technology may
be ported by PSI across technology platforms in a modular way. However, PSI shall not use the Technology as a whole or use a combination of unit processes of the Technology so as to create a system or technology that competes with Sanken’s or
Allegro’s business or technology for five years after PSI establishes its capability to manufacture products for Sanken and Allegro using the Technology based upon successful qualification thereof. 

  
 3 

 11.     Related Documentation. The Parties agree on the following
procedures for documentation related to this Agreement: 
 (a)     The Annual Fee for each fiscal year shall be set
forth in a document executed by an officer or designated representative of each Party. Upon execution, such Annual Fee shall be incorporated herein by reference. 

(b)     The Development Activities shall be identified and agreed by the Team pursuant to such procedures as the Team may
develop from time to time. It shall not be necessary for the Development Activities to be set forth in a document signed by each Party. The Development Activities may be documented in such manner as the Team determines in its discretion. 

(c)     Prices and terms for products manufactured by PSI pursuant to Section 6 shall be determined by the applicable
Parties in any manner they deem appropriate, including without limitation formal agreements, purchase orders and acknowledgements, e-mail communication or such other documentation as may be reasonable and
customary for a supplier-customer relationship. 
 (d)     The documentation described in this Section 11 shall be
maintained in an orderly fashion with the business records of the Parties. However, it shall not be necessary, nor shall it be the practice of the Parties, to attach such documentation as exhibits to this Agreement. 

12.     Term. This Agreement shall continue in effect until such time as (a) the Parties mutually agree to its
termination; (b) the Parties adopt a successor agreement; or (c) the Parties fail to agree upon the Annual Fee for a fiscal year within three months after the commencement of such fiscal year. Sections 7, 8, 9, and 10 herein shall survive
the termination of this Agreement. 
 13.     Confidentiality. Neither Sanken nor Allegro shall disclose any element of
the Technology to any third party, except for specifically identified Sanken or Allegro customers in commercial situations for marketing and qualification purposes. Neither Sanken nor Allegro will apply for any patent in any country in connection
with any Technology without obtaining the permission of, and then only jointly with, the other Party that is a joint owner of the Technology. PSI shall not disclose any element of the Technology to any third party except as expressly permitted by
this Agreement. 
 14.     Improvements. Simple improvements after the Technology has been qualified should be considered
as part of continuous improvement activities, without charge to Sanken or Allegro. Examples of simple improvements are: modifications to unit processes to improve yields or performance; and qualification of new or improved tools for manufacturing.

 15.     Scope of Agreement. This Agreement applies only to Technology developed pursuant to the Development Activities
as defined in this Agreement. Two of the 

  
 4 

 
Parties or all of the Parties may collaborate with respect to technology development that is separate from this Agreement. Unless otherwise agreed by the Parties, any technology development
activities that are covered by the Annual Fee shall be deemed within the scope of this Agreement and other activities shall be presumed not to be within the scope of this Agreement. 

16.     Miscellaneous Provisions. 

16.1     Entire Agreement. This Agreement constitutes the entire understanding between the Parties and
supersedes all prior understandings or agreements concerning the subject matter hereof, including without limitation a letter agreement between the Parties dated as of August 31, 2007; the Joint Technology Development Agreement between the
Parties dated September 13, 2007; an SG5 Phase II Agreement between Sanken and Allegro executed in October 2007; a Memorandum of Understanding dated March 19, 2008; and a First Addendum to the Memorandum of Understanding dated
August 26, 2008. 
 16.2     Amendments. No amendment or modification of this Agreement shall be
effective unless set forth in writing and signed by a duly authorized representative of each Party. 
 16.3
    Assignment. No Party shall assign any or all of its rights and obligations under this Agreement without the prior written consent of the other Parties. 

16.4     Waiver. Any failure by a Party to exercise or enforce any right under this Agreement shall not be
deemed a waiver of such Party’s right thereafter to enforce each and every term and condition of this Agreement. 
 16.5
    Force Majeure. The obligations of a Party under this Agreement will be suspended during the period and to the extent that such Party is prevented or hindered from complying therewith by any cause beyond its
reasonable control including (insofar as such cause is beyond such party’s control but without prejudice to the generality of the foregoing expression); strikes, lockouts, labor disputes, act of God, war, riot, civil commotion, malicious
damage, compliance with any law or governmental order, rule, regulation or direction, accident, breakdown of plant or machinery, fire, flood or storm. In the event of either Party being so hindered or prevented such party will give notice of
suspension as soon as reasonably possible to the other party stating the date and extent of such suspension and the cause thereof and the omission to give such notice will forfeit the rights of such Party to claim such suspension. Any Party whose
obligations have been suspended as aforesaid will not be deemed to be in default of its contractual obligations nor will any penalties or damages be payable. Any such Party will resume the performance of such obligations as soon as reasonably
possible after the removal of the cause and will so notify the other Parties. In the event that such cause continues for more than three (3) months either party may terminate this Agreement on fourteen (14) days written notice. 

  
 5 

 16.6     Language. This Agreement was drafted and
executed in the English language. 
 16.7     Severability. The invalidity or unenforceability of
any portion of this Agreement shall not affect the validity or enforceability of the remainder of this Agreement. 
 16.8
    Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Minnesota. 

16.9     Dispute Resolution. The Parties shall make best efforts to try to resolve any and all
claims, controversies or difficulties between the Parties (“Claims”) by mutual discussions in good faith. Should the Parties be unable to reach resolution themselves, Claims shall be finally settled by arbitration held in Minneapolis,
Minnesota, pursuant to the Commercial Arbitration Rules of the American Arbitration Association. 
 IN WITNESS WHEREOF, the Parties have executed
this Agreement as of the date and year first written above. 
  

					
	POLAR SEMICONDUCTOR, INC.	 		 	ALLEGRO MICROSYSTEMS, INC.
			
	 /s/ Yoshihiro Suzuki
	 		 	 /s/ Dennis H. Fitzgerald

	Yoshihiro Suzuki, President and CEO	 		 	Dennis H. Fitzgerald, President and CEO
			
	SANKEN ELECTRIC CO., LTD.	 		 	
			
	 /s/ Masao Hoshino
	 		 	
	Masao Hoshino, Vice President Sanken Electric Co. LTD

  
 6

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